O, he/she is a good person ...

I acknowledge my transgression, says David. If I admit my fault, then you will pardon it. Let us never assume that if we live good lives we will be without sin; our lives should be praised only when we continue to beg for pardon. But men are hopeless creatures, and the less they concentrate on their own sins, the more interested they become in the sins of others. They seek to criticize, not to correct. Unable to excuse themselves, they are ready to accuse others. 

St. Augustine