The closest that I can think of is "virtue." The Roman Catholic Church contrasts the Seven Deadly Sins with the Seven Cardinal Virtues. However, the word is not normally used by itself to describe a particular act, only a trait (or set of traits: patience, prudence, courage, etc.). It is commonly used in the adjectival form "virtuous", so you could say:

I have committed a sin.

The closest that I can think of is virtue. The Roman Catholic Church contrasts the Seven Deadly Sins with the Seven Cardinal Virtues. However, the word is not normally used by itself to describe a particular act, only a trait (or set of traits: patience, prudence, courage, etc.). It is commonly used in the adjectival form "virtuous", so you could say:

I have committed a sin.