This is my first post on CA (I’ll introduce myself in the proper thread), however, this topic caught my attention.
To answer your question, no, there isn’t a special committee at the Vatican that determines what is mortal sin and what is not. Remember, there are requirements for a sin to be “mortal”. We know that ALL sin is an offense against God and a rejection of his perfect love and justice for us. However, we do not “throw the baby out with the bath water” like some Evangelical would by saying “sin is sin! There is no such thing as big sins and little sins.” That’s absolutely NOT true. Jesus made a distinction between what we call mortal and venial sins. Mortal sins destroy the grace of God in the heart of the sinner. By their very grave nature, a mortal sin cuts our relationship off from God and turns man away from Christ and it damages our relationship with the Church.
In order for a sin to be mortal, it must meet three conditions:
- It must be grave matter.
- Must be committed with full knowledge of the sinner
- Must be committed with deliberate consent of the sinner
What this means is that mortal sin cannot be committed “accidentally”. A person who commits a mortal sin is one who knows that their sin is wrong, but still deliberately commits the sin anyway. This means that mortal sins are “premeditated” by the sinner and thus are truly a rejection of God’s law and love.
I understand your perplexity when you look at different examinations of conscience and you see different sins listed as mortal and venial and sometimes these do not agree. Remember though, that for a sin to be mortal it must be premeditated, it must have the full and willful participation of the sinner. Therefore, one can commit a grave offense against God or the Church and not realize or premeditate the offense and therefore wouldn’t be guilty of a mortal sin.
I would advise you to take this matter up with your confessor. If you find yourself slipping into a sin often, go ahead and confess it…remember, we CAN confess venial sins in confession (as a matter of fact it is a pious practice). It can help up form our consciences more and more and perfect our souls.
It is true that some sins are mortal and others are venial. All sin is an offense against God, however, a mortal sin isn’t something you can just accidentally do. So, if you have a examination of conscience that lists this sin as venial and this sin as mortal I would scrap it (or at the very least take it with a grain of salt) and really examine in your heart if you committed this act with full participation of the will. If not then no mortal sin, if so…then it’s mortal. However, as a pious practice I would confess both.
Just my two cents.
In the Hearts of Jesus and Mary,
-Cody