Mortal sin

In Christian theology, the concept of mortal sin describes a specific type of gravely sinful act. It is also referred to as a deadly, grave, or serious sin. This concept is central to both Catholic and Lutheran traditions. A mortal sin is believed to lead to damnation if the person does not repent before death. Most importantly, it is thought to cause a complete separation from God's saving grace.

For an act to be classified as a mortal sin, three specific conditions must be met simultaneously. First, the act must involve grave matter. This means the subject of the action is inherently serious. Second, the person must act with full knowledge. They must be aware of the sinful nature and the gravity of the offense. Third, the person must give full consent. This means the act is committed through deliberate and complete free will. If any of these three conditions are missing, the sin may not be mortal.

Christianity also distinguishes mortal sins from venial sins. A venial sin is considered less serious and only weakens a person's relationship with God. While venial sins do not cause complete separation, they can have significant effects. They may lessen a person's readiness to serve God or create a distaste for spiritual matters. Over time, venial sins can make sacraments less fruitful or lead a person toward committing mortal sins. In contrast, a mortal sin is seen as a total rejection of God's grace.

The history of this concept traces back to the early leaders of the Church. Some Church fathers realized that people could lose their salvation even after being baptized. This led to the belief that repentance was necessary to avoid eternal punishment. In AD 385, Pacian of Barcelona wrote about "mortal" or "capital sins" in a sermon. He listed murder, fornication, and contempt of God as examples. In AD 393, St. Jerome also wrote on these topics. Some scholars suggest the term originates from the New Testament, specifically 1 John 5:16–17, which mentions a sin that leads to death.

There are many different ways to categorize grave matter. Common examples include stealing substantial property, getting drunk, or missing Mass on Sunday. The Catechism of the Catholic Church also lists things like adultery, divorce, or extramarital sex. Some acts are viewed as especially serious, such as sins against the Holy Spirit or sins that cry to Heaven for vengeance. Some mortal sins can even result in automatic excommunication. This is a legal penalty that restricts a person's participation in church life. Examples include apostasy, which is the renunciation of faith, or a completed abortion.

Sin is not limited to outward actions alone. It can also reside in a person's internal state. This includes their attitudes, tendencies, dispositions, habits, intentions, values, and priorities. Some theologians, like the priest Denis O'Callaghan, suggest mortal sin is a state of being. In this view, a person has reached a point where they reject God to make something else the purpose of their life. However, the Church also teaches that responsibility can be diminished. Factors like ignorance, fear, duress, or mental illness can change how much a person is held responsible for an action.

Despite the gravity of these sins, there is a process for restoration through repentance. For Catholics, the primary way to receive forgiveness is through the sacrament of Confession. During this sacrament, a person names their specific offense and how many times it was committed. This leads to absolution, which restores the person's relationship with God. The Council of Trent declared this sacrament and the Act of Contrition as mandatory Catholic beliefs. Even outside the sacrament, the Church teaches that "perfect contrition" can restore grace if the person intends to confess later. Ultimately, the Church maintains that there are no limits to the mercy of God.