Mortal Sin

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In order for a sin to be mortal, do you have to know %100 that it is a mortal sin when you choose do it? Does not being sure weather or not something is a mortal sin make it venial? I know the basics of what the church considers to be mortal sins, but sometimes I run into gray areas about certain things.
 
In order for a sin to be mortal, do you have to know %100 that it is a mortal sin when you choose do it? Does not being sure weather or not something is a mortal sin make it venial? I know the basics of what the church considers to be mortal sins, but sometimes I run into gray areas about certain things.
You don’t have to “know it’s a mortal sin” per se - otherwise, only theologians would be able to commit sin. You just have to be aware of a fear inside you, of getting caught.

If you fear getting caught, or if you know that your parent, priest, teacher, spouse, child, or best friend would be disappointed in you if they knew you did that, you have the required level of knowledge.
 
mcrea is correct. Knowing that it could be mortal and choosing to commit the sin anyway may well make it a mortal sin for you.
 
I guess if you did know you were commiting a mortal sin that it may be more grevious than if you did not know to be it mortal. Actually you are asking a good question and may I suggest an excellent one. I can remember reading the Diary of St.Maria Faustina and when she saw a vision of the reality of Hell she noticed that most people there did not believe in the reality of Hell. I believe from this deduction one can conclude they did not know what kind of sins they were commiting to lead them there. My understanding is if you realize that you have committed a mortal sin then the mortal sin loses its power. All Confession does is to cap it off. Once you realize the gravity of your sins then the sins loses their power or grip over you and repentance is possible. Let me explain from scripture. King David commited 2 mortal sins ( one is enough to drive out God from you ) by taking Bethsheba and then putting her husband in the front lines to be killed. I don’t think Columbo would have a difficult time trying to solve or prove this crime. King David is now in a state where he needs to repent or he may lose himself forever from God. God had mercy on David by sending the Prophet Nathan to him and explaining out a parable to David. Read the parable in the Bible. After the story told Nathan questioned David to ask him what shall we do to that man. And David said we shall put him to death for what he done. And the Prophet said " You are that Man! " And that is when King David realized the gravity of what he doned and replied back " I have sinned against the Lord! " The mortal sins of King David have now lost their power over him for Nathan said " The Lord has put away your sins. " What happens when you commit a mortal sin is this. You drive out God. God cannot stand to be in a person when that person commits a mortal sin. Now that you have driven out God how does one get Him back? Of course through repentance and confession which will restore you and bring back the Holy Spirit. People might argue about those who are not baptize, what about them. Mortal sins may not be the same for them as for the baptised. Since the baptised have already God in them they need to repent to receive Him back. Not so those outside the Church. Yes they do need to repent however these if they do so can receive Baptism. Repentance will not bring God back since He was not there in you in the first place. However repentance will help you when you decide for Baptism and this will bring the Holy Spirit. However I believe if a person has a change of heart even though that person has not been baptise then God may forgive that person as well and whatever mortal sins they have commited will lose what power or hold it may have on that person. People may or may not know they have commited a mortal sin. Always consult a knowledgable and spiritual priest so he can determine it so. Sometimes a person can believe they have commited a mortal sin when in reality it was not so. So try not to be the judge. Go to your priest. Let him examine you. In most cases people can be their worst enemies. So unless you have killed someone or commited adultery or put to fire your neighbour’s home or neglected the poor around you by not sharing your wealth ( now here I am referring to the Corinthians who when they had their dinners after Mass did not want to share their food with the poor in that same Church which resulted in the eyes of God a most grevious sin ) I think you can be sure you did not commit a mortal sin. Try not to judge yourself but allow the priest to examine you. God Bless!
 
If you do something that may be a mortal sin but you’re not sure, confess it and find out! You are supposed to inform your conscience and if you’re concerned that something you have done or may do could be mortally sinful, you better find out asap. Sure, we would like to think that what we so much want to do isn’t sinful. But sometimes it is. And sometimes it is serious matter.

If you did something without knowing it was seriously sinful, you didn’t commit a mortal sin. But if you deliberately stay ignorant of the seriousness of the action, you are responsible for your own ignorance, especially if you suspect it may be a mortal sin.

Having the fear of getting caught or knowing something is wrong doesn’t necessarily mean the sin is mortal. Of course, we should try to love God enough not to commit deliberate venial sin either. It’s a sad thing to deliberately offend God who is so good to us.
 
You don’t have to “know it’s a mortal sin” per se - otherwise, only theologians would be able to commit sin. You just have to be aware of a fear inside you, of getting caught.

If you fear getting caught, or if you know that your parent, priest, teacher, spouse, child, or best friend would be disappointed in you if they knew you did that, you have the required level of knowledge.
I don’t think that this is quite accurate. I think that to commit a mortal sin you at least have to possess a basic degree of moral formation. Certainly every man has the natural law written in his heart, but without proper moral formation the “whisperings” of one’s conscience can be very faint and often confusing. Force of habit in sin (e.g. sins of the flesh that one falls into in early adolescence) combined with poor/absent catechesis and moral formation can dramatically reduce one’s culpability. Given the horrible state of catechesis and moral knowledge among Catholics today, I think it is perfectly reasonable to say that many Catholics engaged in sinful behaviors today don’t really have the slightest clue that what they are doing is wrong.

*CCC 1859 Mortal sin requires full knowledge and complete consent. It presupposes knowledge of the sinful character of the act, of its opposition to God’s law. It also implies a consent sufficiently deliberate to be a personal choice. Feigned ignorance and hardness of heart do not diminish, but rather increase, the voluntary character of a sin.

CCC 1860 Unintentional ignorance can diminish or even remove the imputability of a grave offense. But no one is deemed to be ignorant of the principles of the moral law, which are written in the conscience of every man. The promptings of feelings and passions can also diminish the voluntary and free character of the offense, as can external pressures or pathological disorders. Sin committed through malice, by deliberate choice of evil, is the gravest.
*

All that being said, however, it’s probably still best to go to confession if there is any doubt and let your confessor decide the gravity of the sin. Even if the sin ends up being venial, doing this will remove doubt in a person’s mind (of which the devil can make great use).
 
I don’t think that this is quite accurate. I think that to commit a mortal sin you at least have to possess a basic degree of moral formation. Certainly every man has the natural law written in his heart, but without proper moral formation the “whisperings” of one’s conscience can be very faint and often confusing. Force of habit in sin (e.g. sins of the flesh that one falls into in early adolescence) combined with poor/absent catechesis and moral formation can dramatically reduce one’s culpability. Given the horrible state of catechesis and moral knowledge among Catholics today, I think it is perfectly reasonable to say that many Catholics engaged in sinful behaviors today don’t really have the slightest clue that what they are doing is wrong.
If they don’t have the slightest clue that it’s wrong, then they won’t experience any fear of getting caught.

It’s the fear of getting caught that tells you that you have done something wrong - not the knowledge of theological terminology, or memorization of lists.
CCC 1859 Mortal sin requires full knowledge and complete consent. It presupposes knowledge of the sinful character of the act,
Which is made evident by the experience of fear of getting caught
of its opposition to God’s law.
Even those who aren’t consciously aware of God can have a sense of universal principles of right and wrong.
It also implies a consent sufficiently deliberate to be a personal choice. Feigned ignorance and hardness of heart do not diminish, but rather increase, the voluntary character of a sin.
Right - so, if someone experiences the fear of getting caught, but then excuses himself by saying “I had never heard the word “mortal sin” before, so it must not have been a sin, for me,” or else if he says, “I didn’t find that particular action in the list of sins on my Examination of Conscience,” he is deceiving himself, to his own hurt.
 
If they don’t have the slightest clue that it’s wrong, then they won’t experience any fear of getting caught.

It’s the fear of getting caught that tells you that you have done something wrong - not the knowledge of theological terminology, or memorization of lists.

Which is made evident by the experience of fear of getting caught

Even those who aren’t consciously aware of God can have a sense of universal principles of right and wrong.

Right - so, if someone experiences the fear of getting caught, but then excuses himself by saying “I had never heard the word “mortal sin” before, so it must not have been a sin, for me,” or else if he says, “I didn’t find that particular action in the list of sins on my Examination of Conscience,” he is deceiving himself, to his own hurt.
I still don’t think that a simple “fear of getting caught” fulfills the “full knowledge” and “deliberate consent” criteria stated by the Catechism. Can you provide an authoritative source that states this?

Certainly “fear of getting caught” gives someone a degree of knowledge that something might be wrong and could render a specific action sinful. There is, however, a difference between the level of knowledge required of a venial sin vs a mortal sin. This difference isn’t so much the knowledge of what the term “mortal sin” means as an appreciation of the consequences of one’s actions.

For example, a teenager engages in sexual acts with a girlfriend. He has been to Church and knows that sex before marriage is wrong but hasn’t been told that any other intimacy short of intercourse is sinful. While he may certainly be worried about “getting caught” he doesn’t have an appreciation for the fact that these acts are serious sins against chastity. He may, in fact, think that he is being virtuous since all of his friends are “going all the way” but he and his girlfriend don’t. I would argue that this teenager is committing a venial sin.

Now let’s say that this teenager’s parents find out what’s going on and give their son a long talk about chastity, explaining what the Church teaches on the subject and where lines need to be drawn. If this teenager would then engage in the same acts after this point, he would likely be committing mortal sin.
 
Just to clarify (after reading some of the other postings) I am NOT arguing that if someone commits a sin while consciously wondering whether it is mortal or not is somehow absolved from having to go to confession. If a person has enough moral formation to know that a) there are mortal sins and b) the activity that they are about to engage in may be one of them, then that person is culpable for committing a mortal sin if they go ahead with the activity. What I am talking about is people who don’t have enough moral formation to know that mortal sins do in fact cover more things than just murder, robbery, and cheating on one’s spouse. I guarantee you that 90% of all Catholics educated in the Post-Vatican-II “Jesus loves everyone” CCD programs and Catholic schools have just that concept of mortal sin.
 
I guarantee you that 90% of all Catholics educated in the Post-Vatican-II “Jesus loves everyone” CCD programs and Catholic schools have just that concept of mortal sin.
Yes, I know - which is why they need to listen to that still small voice of the fear of God, or the fear of Mom (whichever one is operational, in their particular case), rather than, or in addition to what they “know” (or don’t know) about mortal sin.
 
Yes, I know - which is why they need to listen to that still small voice of the fear of God, or the fear of Mom (whichever one is operational, in their particular case), rather than, or in addition to what they “know” (or don’t know) about mortal sin.
You still haven’t answered my question. I am curious to know where in Church teaching you can find an equivalence between “being afraid of getting caught” and “having full knowledge and deliberate consent necessary to commit a mortal sin.” I have read the majority of the Catechism and a large sampling of writings of various Doctors and Popes and have never come across this particular formulation.
 
ies0716 is right. I hope you do not mind calling you this. Your name is similar to those in a TV series I onced watch " The Prisoner ". To have a conscience you need to form one. The natural law just will not do today for the vast majority. To form a conscience one must be taught especially among the youth, I mean from day one. I really agree with this poster about you been caught. How can one be caught if one doesn’t know. The catechism teaches us but this is only knowledge. What must be taught is not so much cathechism but to have a guide that will lead you and teach you from your early years. This is vastly more important and is very neglected in the West. You had this at one time but today it is forgotten alot. You need to be in a relationship with someone you can trust to help you with all the up and downs in life. This guide or as we call it in the Eastern Church a spiritual guide will help you develope this conscience and direct you in dealing with it. Read the Diary of St.Maria Faustina about the importance of having a guide. It is important to the Eastern christian for we never forgotten the advantage it gives us. We are losing abit of it here in the West and hopefully it will come back. These guides can help you tremendously and bring to you a better formed conscience so that when you have reached a mature state you will probably not commit any mortal sins. God Bless!
 
You still haven’t answered my question. I am curious to know where in Church teaching you can find an equivalence between “being afraid of getting caught” and “having full knowledge and deliberate consent necessary to commit a mortal sin.” I have read the majority of the Catechism and a large sampling of writings of various Doctors and Popes and have never come across this particular formulation.
It’s a way of knowing. It’s a test of conscience. “Did I commit a sin when I did this?”

Well, here’s a test- were you afraid at the time that you might get caught?

No, I didn’t realize I was doing anything wrong. We did it out on the front lawn.

Answer: Then, it’s not a mortal sin.

OR

Yes, I knew my girlfriend’s Dad would want to kill me, so we made sure to do it in secret.

Answer: Well then, you need to go to Confession.
 
It’s a way of knowing. It’s a test of conscience. “Did I commit a sin when I did this?”

Well, here’s a test- were you afraid at the time that you might get caught?

No, I didn’t realize I was doing anything wrong. We did it out on the front lawn.

Answer: Then, it’s not a mortal sin.

OR

Yes, I knew my girlfriend’s Dad would want to kill me, so we made sure to do it in secret.

Answer: Well then, you need to go to Confession.
Yes, I am quite aware of your position. What I am asking for is some evidence (other than your own opinion) that it is true. I do not dispute that when you do something that you know (or think, or suspect) might be wrong, you are committing a sin and prudence would dictate that you go to confession for it. What I am arguing is that simple “fear of being caught” does not necessarily mean that one’s knowledge and consent rise to the level of a mortal sin that would need to be confessed upon pain of going to Hell.

Let me give you another example, this time from the CCC:

*2352 By masturbation is to be understood the deliberate stimulation of the genital organs in order to derive sexual pleasure. "Both the Magisterium of the Church, in the course of a constant tradition, and the moral sense of the faithful have been in no doubt and have firmly maintained that masturbation is an intrinsically and gravely disordered action."138 “The deliberate use of the sexual faculty, for whatever reason, outside of marriage is essentially contrary to its purpose.” For here sexual pleasure is sought outside of "the sexual relationship which is demanded by the moral order and in which the total meaning of mutual self-giving and human procreation in the context of true love is achieved."139

To form an equitable judgment about the subjects’ moral responsibility and to guide pastoral action, one must take into account the affective immaturity, force of acquired habit, conditions of anxiety or other psychological or social factors that lessen, if not even reduce to a minimum, moral culpability. *

In this case, the Church is saying that there are factors (such as affective immaturity, force of acquired habit, and conditions of anxiety) that would lessen or even reduce culpability to a minimum. If culpability is “reduced to a minimum” that would mean that one did clearly not commit a mortal sin even though any teenager would obviously be “afraid of getting caught” in the act of masturbation.
 
Yes, I am quite aware of your position. What I am asking for is some evidence (other than your own opinion) that it is true. I do not dispute that when you do something that you know (or think, or suspect) might be wrong, you are committing a sin and prudence would dictate that you go to confession for it. What I am arguing is that simple “fear of being caught” does not necessarily mean that one’s knowledge and consent rise to the level of a mortal sin that would need to be confessed upon pain of going to Hell.
What I am saying is, that your body knows - your conscience knows - that what you were doing was wrong.

Your conscience is not the set of your personal opinions - it is the instinctive reaction of your body to the things that you are doing. Fear is a message from your conscience that something is wrong. Anger is a message from your conscience that an injustice has taken place. Joy is a message from your conscience that things are going well. Etc.
Let me give you another example, this time from the CCC:
*2352 By masturbation is to be understood the deliberate stimulation of the genital organs in order to derive sexual pleasure. "Both the Magisterium of the Church, in the course of a constant tradition, and the moral sense of the faithful have been in no doubt and have firmly maintained that masturbation is an intrinsically and gravely disordered action."138 “The deliberate use of the sexual faculty, for whatever reason, outside of marriage is essentially contrary to its purpose.” For here sexual pleasure is sought outside of "the sexual relationship which is demanded by the moral order and in which the total meaning of mutual self-giving and human procreation in the context of true love is achieved."139
To form an equitable judgment about the subjects’ moral responsibility and to guide pastoral action, one must take into account the affective immaturity, force of acquired habit, conditions of anxiety or other psychological or social factors that lessen, if not even reduce to a minimum, moral culpability. *
In this case, the Church is saying that there are factors (such as affective immaturity, force of acquired habit, and conditions of anxiety) that would lessen or even reduce culpability to a minimum. If culpability is “reduced to a minimum” that would mean that one did clearly not commit a mortal sin even though any teenager would obviously be “afraid of getting caught” in the act of masturbation.

Yes, but even in this case, there was a first time for doing it, in which the teenager was not yet subject to the forces of acquired habit, or etc., and had the opportunity to know or sense that he was doing something bad. Right? 🤷

But if he had no idea that there was anything the matter with it, he wouldn’t be afraid of getting caught - if he believed that it is normal and natural, then he would not experience any fear. And only in this case could we say that after a number of years, he would have acquired a bad habit, after which he finds out that it’s a sin, but at that point, he would have lessened culpability because when he first started doing it (before it became a habit) he didn’t know it was wrong, and it was only after it became a habit that he found out that it was wrong.
 
In order for a sin to be mortal, do you have to know %100 that it is a mortal sin when you choose do it? Does not being sure weather or not something is a mortal sin make it venial? I know the basics of what the church considers to be mortal sins, but sometimes I run into gray areas about certain things.
Thats a question best asked in the confessional. Tell the Priest everything about the situation. I know there are times I have confessed a sin thinking it was a mortal sin and the Priest asked me a few questions and said it wasnt. I am sure the same can be said of some going the other way. But the great thing about being a Catholic is the fact that we have the confessional. Confess all of your sins whether venial and mortal and regardless you will come out that door restored in the good Grace of GOD!

Pax
 
I’m getting a little weary of this discussion. It’s obvious that you aren’t understanding my point. I agree that “fear of getting caught” may equal a certain degree of “knowledge” about a particular sin. For a sin to be mortal, however, requires more than simply “knowledge.” If simply having an inkling that something may be amiss was enough, then the Church would be sure to say so by making the conditions of mortal sin be grave matter, knowledge, and consent.

However, this is not the case. The three conditions are, of course:
  1. Grave matter
  2. Full knowledge
  3. Deliberate consent
Full knowledge is certainly something different than simply knowledge. If a child witnesses an older sibling being grounded for a month by his parents for a certain act, then he will be afraid of getting in caught in that same act for fear of the consequences. Full knowledge requires that one be aware of the gravity of the sin. This doesn’t necessarily need to be a “theological” knowledge, but rather a simple knowledge that the act you are about to engage in is deeply harmful to one’s self or others.

I am still waiting for some citation backing up your viewpoint. Unless you post some sources to back up your opinion, I’m not going to post anymore in response to this because I want to avoid a flame war. I think that you owe the original poster an authoritative source to back up your musings. An overly harsh definition of mortal sin can lead to problems with scrupulosity. If someone reads your postings and takes them to heart they may spend a long time agonizing about things they did long ago before they ever had any idea of God’s moral law.
 
Thats a question best asked in the confessional. Tell the Priest everything about the situation. I know there are times I have confessed a sin thinking it was a mortal sin and the Priest asked me a few questions and said it wasnt. I am sure the same can be said of some going the other way. But the great thing about being a Catholic is the fact that we have the confessional. Confess all of your sins whether venial and mortal and regardless you will come out that door restored in the good Grace of GOD!

Pax
This I will agree with. Holding sins back because you think they might not be mortal is not a good recipe for salvation (or mental health for that matter).
 
I’m getting a little weary of this discussion. It’s obvious that you aren’t understanding my point. I agree that “fear of getting caught” may equal a certain degree of “knowledge” about a particular sin. For a sin to be mortal, however, requires more than simply “knowledge.” If simply having an inkling that something may be amiss was enough, then the Church would be sure to say so by making the conditions of mortal sin be grave matter, knowledge, and consent.

However, this is not the case. The three conditions are, of course:
  1. Grave matter
  2. Full knowledge
  3. Deliberate consent
The point that I am trying to emphasize is that it is not required that we have a Doctoral Degree in moral philosophy in order to become capable of committing mortal sin. That you don’t know every single possible consequence of what you are doing in no way excuses you, if you knew that it was wrong (even if you couldn’t explain why or how you knew that), and then went ahead and did it anyway.

The Church places instruction for First Reconciliation in the Religion curriculum for third grade, in the expectation that the children will be receiving First Reconciliation that year or the following year - which tells us that an ordinary eight or nine year old child’s understanding of “wrongness” is sufficient to qualify as “full knowledge.”
 
The point that I am trying to emphasize is that it is not required that we have a Doctoral Degree in moral philosophy in order to become capable of committing mortal sin. That you don’t know every single possible consequence of what you are doing in no way excuses you, if you knew that it was wrong (even if you couldn’t explain why or how you knew that), and then went ahead and did it anyway.

The Church places instruction for First Reconciliation in the Religion curriculum for third grade, in the expectation that the children will be receiving First Reconciliation that year or the following year - which tells us that an ordinary eight or nine year old child’s understanding of “wrongness” is sufficient to qualify as “full knowledge.”
I don’t believe that the Church places First Reconciliation so early with the expectation that third graders will be confessing mortal sins. Because the distinction between venial and mortal can be a fine one, typically children are told to confess ALL of their sins in confession.

I do agree with your point that one doesn’t need a PhD in Moral Philosophy in order to commit a mortal sin. In fact, it’s probably quite likely that simple Catholic peasants in days of yore had a clearer grasp on the natural law than we “educated” moderns do. The point that I’m trying to make is that the question of what constitutes “full knowledge” is a complex one, not easily reduced to simple checks like “were you afraid of getting caught.”

Maybe a better solution than arguing negatively against your premise would be to propose my own thoughts on the matter. I think to determine whether one had full knowledge and deliberate consent on a particular objectively grave sin, one could ask himself the following questions. If any of them are “yes” then you’ve (most likely) met the requirement for full knowledge and deliberate consent. From a practical perspective, of course, the best bet is to confess all sins (particularly those involving grave matter and/or gray areas) and let the priest decide.

Full Knowledge
  1. Did I know and understand this sin to be mortally sinful in the eyes of the Church?
  2. Did I know that Jesus Christ preached that this was a grave sin?
  3. Did I feel terrible as I prepared to do this, as if I knew it was very wrong?
  4. Was I aware that this act could cause serious harm (whether physical, emotional, or moral) to myself or to another?
  5. Did I suspect or know that I would have to go to Confession for this sin before I could receive communion again?
  6. Did I have to deliberately drink or do drugs leading up to this act, to deaden my conscience?
Deliberate Consent
  1. Did I actually choose to do this act or was I forced into doing it by another?
  2. Was I manipulated at all to do this act, particularly by someone I respect or someone in authority over me? (The answer to this one would have to be “no” to imply consent.)
  3. Was I of “sound mind and body” when I committed this act?
  4. Did I think about the moral implications of this act prior to doing it?
  5. Did I, knowing that this was a gravely sinful act, willfully do it anyway?
  6. Did I, knowing or suspecting that this would offend God gravely, willfully do it anyway?
 
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