
In Catholicism, a mortal sin is a grave violation of God's law that results in the sinner being cut off from God's sanctifying grace and potentially facing eternal damnation. Mortal sins are considered more serious than venial sins as they represent a deliberate turning away from God and require confession for absolution. While the Catholic Church does not provide an exhaustive list of mortal sins, certain acts such as idolatry, heresy, murder, adultery, and abortion are widely considered to be mortal sins.
| Characteristics | Values |
|---|---|
| Grave matter | Idolatry, adoration of a false god, sacrilege, heresy, abortion, euthanasia, suicide, murder, manslaughter, adultery, extramarital sex, divorce, masturbation, contraception, IVF, sterilization, use of a condom, oral contraceptive, IUD, child abuse, neglect of one's parents, contempt of God, fornication, lying, violence against parents |
| Full knowledge | Awareness of the sinful action and the gravity of the offence |
| Deliberate consent | Full willingness to commit the sin |
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What You'll Learn

Mortal sins are a type of grave sin
In the Catholic faith, sins are classified into two types: venial sins and mortal sins. Mortal sins are considered a more serious offense than venial sins because they cut off an individual's relationship with God and must be resolved through confession.
Mortal sins are those that can and must be confessed during a confession. They are absolutely forgivable, but if left unrepented, they bring eternal death and damnation. Mortal sins are committed with full knowledge that the act is a mortal sin, and with full willingness to do it anyway.
Three conditions must be met for a sin to be considered mortal: firstly, the sin must be of "grave matter", meaning that the sin is serious. Secondly, the sin must be committed with "full knowledge" of the sinful action and the gravity of the offense. Finally, the sin must be committed with "deliberate consent", or the "deliberate will to commit the sin".
Examples of mortal sins include idolatry, adoration of a false god, sacrilege, and sins against the Holy Spirit. Other examples include abortion, euthanasia, suicide, murder, and manslaughter.
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They require confession and repentance
Mortal sins are the gravest of sins in the Catholic faith and require confession and repentance. They are acts of serious offence that cut followers off from God's sanctifying grace. Mortal sins represent a deliberate turning away from God and His commandments.
The Catechism of the Catholic Church teaches that mortal sins require three conditions to be met: grave matter, full knowledge, and deliberate consent. Grave matter refers to the seriousness of the sin, while full knowledge means the person is aware of the sinful nature of their actions and the gravity of the offence. Deliberate consent implies that the person willingly chooses to commit the sin.
Confession and repentance are necessary for the forgiveness of mortal sins. The Catholic Church teaches that those who die in a state of mortal sin go to hell, while those who confess and repent can receive God's forgiveness and be saved from eternal death. The sacrament of confession and the act of contrition for absolution are essential steps in seeking forgiveness for mortal sins.
Examples of mortal sins include idolatry, heresy, abortion, euthanasia, suicide, murder, and sins against the Holy Spirit. These sins are considered grave matters that violate God's law and require confession and repentance for forgiveness.
It is important to note that not all violations of the Ten Commandments are mortal sins, and the evaluation of a sin's gravity depends on various factors, including the circumstances, intentions, and consequences. Mortal sins can be confessed to a priest, and repentance involves seeking God's forgiveness and working to restore one's relationship with God.
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They are a violation of the Ten Commandments
Mortal sins are those that can and must be confessed during a confession. They are absolutely forgivable, but only through repentance and God's forgiveness. Mortal sins are considered more serious than venial sins because they cut off your relationship with God.
Mortal sins are a violation of the Ten Commandments. The Catechism of the Catholic Church states that the Ten Commandments lay out "the first principles" of the moral law. The first of the Ten Commandments states that we shall not have any other Gods aside from the one true God. Thus, acts of worshipping false Gods are considered mortal sins. This includes idolatry, sacrilege, and heresy.
The sixth commandment states that a person should not kill because taking a life is a very grave matter. Thus, acts such as abortion, euthanasia, suicide, and murder/manslaughter are considered mortal sins.
The Catechism of the Catholic Church also notes that certain actions in the area of human sexuality can be considered mortal sins, including extramarital sex, divorce (but not legitimate separation), and masturbation. Sins against the Holy Spirit and those that cry to Heaven for vengeance are also considered mortal sins.
It is important to note that not every violation of the Ten Commandments is a mortal sin, and not every mortal sin is a direct and obvious violation of the Ten Commandments. The gravity of a sin depends on various factors, including the circumstances, the intentions of the sinner, and the harm suffered by the victim.
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They are a deliberate turning away from God
Mortal sins are those that can and must be confessed during a confession. They are absolutely forgivable. Mortal sins are considered more serious offenses than venial sins because they cut off one's relationship with God. They are a deliberate turning away from God and His commandments.
Mortal sins are a grave violation of God's law, and they turn people away from God by making them prefer an inferior good to Him. They destroy charity in the heart of man. Mortal sins result in the privation of sanctifying grace, or the state of grace. If not redeemed by repentance and God's forgiveness, they cause exclusion from Christ's kingdom and eternal death in hell.
According to the Catechism of Saint Pius X, "Besides grave matter, there is also required full consciousness of the gravity of the matter, along with the deliberate will to commit the sin." Mortal sins must be committed with full knowledge that they are mortal sins and with full willingness to do them anyway.
The Catholic Church does not provide a precise list of mortal sins, but some of the most common examples include idolatry, heresy, abortion, euthanasia, suicide, murder, manslaughter, adultery, and sexual sins such as contraception, IVF, and abortion.
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They result in exclusion from Christ's kingdom
Mortal sins are acts of serious offence that cut Catholics off from God's sanctifying grace. They represent a deliberate turning away from God and His commandments. According to the Catechism of the Catholic Church, mortal sins "destroy in us the charity without which eternal beatitude is impossible. Unrepented, it brings eternal death".
Mortal sins result in exclusion from Christ's kingdom and the eternal death of hell. This is because mortal sins deprive us of God's sanctifying grace, meaning we cease to be part of the body of Christ. Those who die in a state of mortal sin go to hell, while those who die in sanctifying grace go to heaven or heaven via Purgatory.
Mortal sins must be confessed and repented to be forgiven. Confession and repentance are the only ways to regain Jesus' friendship after committing a mortal sin. This is because mortal sins kick the Blessed Trinity out of our souls.
To be considered a mortal sin, three conditions must be met: the sin must be of grave matter, committed with full knowledge of the sin and its gravity, and with deliberate consent. Grave matter refers to the seriousness of the sin. For example, violence against parents is considered graver than violence against a stranger. Similarly, stealing from a millionaire is less evil than stealing food from a starving man.
Mortal sins are distinguished from venial sins, which are minor offences that can be atoned for without confession. While venial sins weaken a person's relationship with God, mortal sins destroy it.
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Frequently asked questions
Mortal sins are those that can and must be confessed during a confession. They are absolutely forgivable, but if not redeemed by repentance and God's forgiveness, they bring eternal death. Mortal sins are committed with full knowledge and awareness of the sinful action and the gravity of the offence.
Some examples of mortal sins include idolatry, adoration of a false god, sacrilege, abortion, euthanasia, suicide, murder, manslaughter, adultery, contraception, IVF, sterilisation, and condom use.
Mortal sins are considered more serious offences than venial sins as they cut off your relationship with God and must be resolved through confession. Venial sins are minor offences that can be atoned for without confession.
To identify if you have committed a mortal sin, you can refer to the Catholic Examination of Conscience, which is used to reveal mortal sins before confession. You can also consider if your actions have met the three conditions of a mortal sin: grave matter, full knowledge, and deliberate consent.













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