What is mortal sin? Requirements, effects, regain grace

Mortal sin
Mortal sin is a disobedience to the law of God in serious matters, carried out with full mindfulness of the mind and deliberate consent of the will, against the Church, the Mystical Body of Christ.
In order for sin to be mortal it is necessary that the act done is truly a human act, that is, that it proceeds from the free will of man, who clearly perceives the goodness or malice of the act.
Only then does man become responsible and author of his act, good or bad, worthy of reward or punishment. It is a serious lack of love for God.

Requirements for mortal sin
Three elements are required to define a mortal sin:
1. serious matter, that is, a serious transgression of the law;
2. full warning of the mind;
3. the deliberate consent of the will.
1 - The serious matter, that is the serious transgression of a divine or human, ecclesial or civil law. Here are the main and most common serious transgressions of these laws.
- To deny or doubt the existence of God or any truth of faith taught by the Church.
- Blaspheme God, Our Lady or the Saints, uttering, even mentally, offensive titles and expressions.
- Do not participate in the Holy Mass on Sunday or in the holy days of precept without any serious reason, but only for laziness, negligence or bad will.
- Treat your parents or superiors in a seriously offensive way.
- Killing a person or seriously injuring him.
- Procure abortion directly.
- Committing impure acts: alone with masturbation or in company in fornication, adultery, homosexuality or any other kind of impurity.
- Prevent, in any way, the conception, in the fulfillment of the conjugal act.
- Stealing objects or goods of others of significant value or stealing them by deception and deception.
- Defraud the taxman for a very substantial sum.
- To cause serious physical or moral damage to a person with slander or with a lie.
- Cultivating impure thoughts and desires of what is forbidden by the sixth commandment.
- Make serious omissions in the fulfillment of one's duty.
- Receive a sacrament of the living (Confirmation, Eucharist, Anointing of the Sick, Order and Marriage) in mortal sin.
- Get drunk or take drugs in a serious way up to prejudice the faculties of reason.
- Be silent in confession, for shame, some serious sin.
- To cause scandal to others with actions and attitudes of heavy gravity.
2 - The full warning of the mind, or to know and estimate that what one is about to do or to omit is seriously prohibited or commanded, that is, to go against one's conscience.
3 - The deliberate consent of the will, that is, the will to deliberately do or omit what is clearly known that it is a serious evil, which, objectively, is a mortal sin.

To have a mortal sin, these three elements must exist simultaneously in a sinful action. If even one of these is missing, or even a part of only one, for example there is no warning, or there is no full consent, we no longer have mortal sin.

Effects of mortal sin
1 - Mortal sin deprives the soul of sanctifying grace, which is its life. It is called mortal because it breaks the vital relationship with God.
2 - Mortal sin separates God from the soul, which is the temple of SS. Trinity, when it is in possession of sanctifying grace.
3 - Mortal sin makes the soul lose all the merits, acquired in the past, as long as it lived in the grace of God: they are rendered ineffective.
"All the righteous works he has done will be forgotten ..." (Ezek 18,24:XNUMX).
4 - Mortal sin takes away from the soul the ability to perform meritorious works for paradise.
5 - Mortal sin makes the soul worthy of hell: who dies in mortal sin goes to hell for all eternity.
Who, once and for all, has chosen God as the supreme and only Good of life, can be guilty of a true mortal sin, committing a serious action, objectively contrary to his law and, in case of death, deserve hell, because his choice, however sincere and effective, can never be so radical and definitive as to prevent making another one capable of canceling the previous one.
The possibility of perversion - as long as you live - is equal to that of conversion, even if this makes it more difficult, when it is more total and decisive. Only after death will the decision made during life be irrevocable.
The above thought is confirmed by the Holy Scripture of the AT in Ezekiel 18,21-28.

How can sanctifying grace lost with mortal sin be regained?
The sanctifying grace (with all that it entails) lost with mortal sin, can be regained in two ways:
1 - with a good Sacramental Confession.
2 - With an act of perfect contrition (pain and purpose), united with the purpose of a prompt confession.