What is mortal sin? --**Mortal sin is a grievous offense against the law of God. **
*Any wilful thought, word, action or omission, in serious violation of God’s law, is a mortal sin. Examples of mortal sin are blasphemy, wilful murder, adultery, arson, robbery, etc. Mortal sin occurs as soon as God is no longer our final end in our thoughts, words, and actions.
Each mortal sin we commit is a three-fold insult to Almighty God: it insults Him by rebellion or disobedience, by ingratitude, and by contempt.
Circumstances of person, cause, time, place, means, object, and evil consequences enhance or decrease the guilt of the sin.
Thus mortal sins, although all mortal, differ in the weight of their guilt. *
What three things are necessary to make a sin mortal? --To make a sin mortal, these three things are necessary:
*First, the thought, desire, word, action, or omission must be seriously wrong or considered seriously wrong. - The matter must be grave, something very important.
A slight act of vanity or impatience is not serious matter, but murder is. Things seriously evil are known to be such from Sacred Scripture, Tradition, the teachings of the Church, or from their nature.
Second, the sinner must be mindful of the serious wrong. - He must have full knowledge and reflection or attention, and know that what he does is grievous.
The person must know the malice and evil of what he is doing. A man who steals a precious diamond ring in the belief that it is glass has not full knowledge. A man who throws a lighted match thoughtlessly aside may throw it into a gasoline tank and cause an explosion, but he has not full attention. “For I formerly was a blasphemer, a persecutor and a bitter adversary; but I obtained the mercy of God because I acted ignorantly, in unbelief” (1 Tim. 1:13).
Third, the sinner must fully consent to it. -He must do it of his own free will, saying deliberately, “I will do this.”
When one realizing what he is doing, still freely does it, he gives the matter deliberate consent. Therefore infants and idiots cannot commit mortal sin; they cannot fully realize what they do.
Is mortal sin a great evil? --Mortal sin is a great evil, the greatest evil in the world, a greater evil than disease, poverty, or war, because it separates us from God.
“But they that commit sin and iniquity are enemies to their own soul” (Job. 12:10).
It is a rebellion against and contempt of God, the blackest ingratitude towards Him.
Our heavenly Father gave us everything we have, and in return we offend Him. We desecrate His temple. “Do you not know that you are the temple of God and that the Spirit of God dwells in you?” (1 Cor. 3:16). By mortal sin a vile and insignificant creature offends and insults the infinite Creator.
It is crucifying Christ again, “since they crucify again for themselves the Son of God and make him a mockery” (Heb. 6:6).
We can never fully realize the malice of mortal sin. We can get a small idea of it by remembering that God sent His own beloved Son to suffer untold agonies, to save us from its consequences.
Mortal sin must be a most terrible thing indeed to make a just and merciful God create hell for the everlasting punishment of the rebellious angels and of sinners who die with even only one mortal sin.
Even considering only its temporal penalties mortal sin is great folly. Upon it follows moral disquiet; the sinner loses the serenity and cheerfulness of the just soul. “The wicked are like the raging sea, that cannot rest” (Is. 57:20). Sickness and want are often consequences of sin, as well as loss of a good reputation.*
willingshepherds.org/My%20Catholic%20faith/My%20Catholic%20Info.htm#Mortal%20Sin
Yeah howdy that’s a mortal sin!