What are the sins of omission or commission?
Moses with the tablets of the Ten Commandments, painting by Rembrandt (1659) (Photo credit: Wikipedia) |
The positive aspect of the catechetical definition of sin refers to overt, actual stepping over the boundaries of God's law. It is a sin of commission.
Sometimes God expresses His laws in negative terms (do not . . .) and sometimes in positive terms (do . . .). The Ten Commandments contain both forms (do not steal; honor your father and mother).
Both sins of omission and sins of commission are real sins. They incur real guilt. When we do what God forbids, we are guilty of a sin of commission; when we fail to do what God commands, we are guilty of a sin of omission. In both cases the law of God is violated.
James 4:17: "Therefore, to him who knows to do good and does not do it, to him it is sin."
Psalm 51:1-3: "Have mercy upon me, O God, according to Your lovingkindness; according to the multitude of Your tender mercies, blot out my transgressions. Wash me thoroughly from my iniquity, and cleanse me from my sin. For I acknowledge my transgressions, and my sin is ever before me."