Finally, the capital sins are also considered grave matter. These sins are vices and are defined as contrary to the Christian virtues of holiness. They are pride, avarice, envy, wrath, lust, gluttony, and sloth (acedia).
The Catechism of the Catholic Church defines grave matter: Grave matter is specified by the Ten Commandments, corresponding to the answer of Jesus to the rich young man: "Do not murder, Do not commit adultery, Do not steal, Do not bear false witness, Do not defraud, Honor your father and your mother."
These sins involve a grave matter committed with full knowledge and done freely and deliberately. Examples of mortal sins include murder, adultery, blasphemy, and idolatry.
Grave matter is a term used as a criterion for mortal sin (the others being knowledge and free will). An authoritative definition of mortal sin is provided by St. Augustine as “something said, done, or desired contrary to the eternal law, or a thought, word, or deed contrary to the eternal law” as a voluntary act.
According to the Catholic Church, there are seven mortal or cardinal sins: lust, gluttony, avarice (greed), sloth (laziness), anger, envy, and pride.
In the Book of Matthew (12: 31-32), we read, "Therefore I say to you, any sin and blasphemy shall be forgiven men, but blasphemy against the Spirit shall not be forgiven.
The unpardonable sin is blasphemy against the Holy Spirit. Blasphemy includes ridicule and attributing the works of the Holy Spirit to the devil.
Gluttony becomes a mortal sin when one eats or drinks to such an excess that it greatly impairs health or makes a person unfit to perform the duties required of him.
It is still considered a mortal sin to miss Mass on a day of obligation without a good reason. The church has always believed that this obligation stems from the Ten Commandments given to Moses, one of which was to “Remember the Sabbath day, to keep it holy.”
Our Sunday Mass obligation is based on the Third Commandment: “Remember the sabbath day — keep it holy” (Ex 20:8). All of the commandments of God are serious matter, so to deliberately miss Mass on Sunday — without a just reason — would objectively be considered a mortal sin.
“Anyone who is aware of having committed a mortal sin must not receive Holy Communion, even if he experiences deep contrition, without having first received sacramental absolution, unless he has a grave reason for receiving Communion and there is no possibility of going to confession,” the Catechism adds.
You do not need to confess to a pastor, priest, or spiritual leader to be forgiven. You do not need another human mediator, since (by faith) you already have Jesus Christ: “For there is one God, and there is one mediator between God and men, the man Christ Jesus…” (1 Timothy 2:5).
As a general rule, Catholics are obliged to attend Mass each Sunday. This is in fulfillment of the Second Commandment. Simply watching Mass on TV does not fulfill the obligation. A Catholic who can reasonably do so must attend Mass at a parish church or oratory.
A venial sin is when we break God's law in a less serious matter, or when we violate it in a grave matter but without full knowledge or consent of what we are doing. And by receiving the Eucharist at Mass we can be forgiven of those sins.
The obligation to attend Mass on Sunday and other holy days of obligation is the ordinary expectation for Roman Catholics (Canon 1247). However, extraordinary circumstances such as sickness or severe weather excuse the faithful from this obligation.
Gluttony is described as excessive eating, drinking and indulgence, and covers also greed. It is listed in Christian teachings among the “seven deadly sins.” Some faith traditions clearly label it as a sin, while some others just discourage or prohibit gluttony.
Pride (superbia), also known as hubris (from Ancient Greek ὕβρις) or futility. It is considered the original and worst of the seven deadly sins on almost every list, the most demonic. It is also thought to be the source of the other capital sins. Pride is the opposite of humility.
Sloth is one of the seven deadly sins in Catholic teachings.
Jesus forgives all sin
The Bible teaches that the blood Jesus' shed on the cross covers all sin, including infidelity. “… the blood of Jesus, God's Son, purifies us from all sin” (1 John 1:7). This means that any sin we commit, including infidelity, can be forgiven when we come to Jesus with a repentant heart.
The unpardonable sin refers to Jesus' words in the Gospel of Matthew: “Therefore, I say to you, every sin and blasphemy will be forgiven people, but blasphemy against the Spirit will not be forgiven.
Confession Is As Old As Christianity
However, confessing one's sins to a priest has been the common practice among Christians since the time of Christ. The New Testament tells us of the practice: The prayer of faith will save the sick, and the Lord will raise them up; and anyone who has committed sins will be forgiven.