Actual sin
Both venial and mortal sins have a dual nature of punishment. They incur both guilt for the sin, yielding temporal punishment for the sin, and punishment. Reconciliation is an act of God's mercy, and addresses the guilt and eternal punishment for sin. Indulgences and purgatory address exercise of God's justice, and the punishment for sin.
Traditionally called damnation if left un-reconciled, mortal sins may lead to eternal separation from God.
The notion of sin is complicated, and the language large and diverse so that it can be best to examine the reality of sin in the Pentateuch first, then reflect. Because, most of all, it is why we need 7 sins a Savior, we have to understand sin. God has sent Him, the Lord Jesus Christ, to rescue His people from their sins. And He saves sinners who repent and ask Him. We have all come from Adam and Eve, so we inherited what theologians call sin.
Personal sins are mortal or venial. Yet it hath no more dominion over him, though sin may be in the Christian he hath an unfeigned respect to all God's commandments, which makes conscience even of little sins and duties. New Testament accepts the Judaic notion of sin but regards the state for a state that Jesus came to heal of individual and collective sinfulness of humanity.
Aristotle's Nicomachean Ethics lists several positive, healthy qualities, excellences, or virtues. Aristotle asserts that for every quality two negative vices are located on each extreme of the merit. Courage is excellence or virtue in confronting risk and fear. One rash, while a deficiency of courage makes one cowardly is made by excessive guts. This principle of merit found in the middle or"mean" between deficiency and excess is Aristotle's notion of the golden mean.
God sent His only Son to satisfy that judgment for people who believe in Him. Jesus, the founder and eternal Son of God, who lived a sinless life, loves us so much he died for our sins, taking the punishment that we deserve, was buried, and rose from the dead according to the Bible. The mark, in this case, is the standard of perfection established by God and evidenced by Jesus. It is clear that we are all sinners.
No man is free, but he that has his will expanded by enjoying nothing else, and whatever God loves. For sin your entire life, work hard and your own retirement is passing. But God's gift is life, eternal life, delivered by Jesus, our Master. Thank God! Jesus Christ will save me.