But the world is a big place and you only have one life to live. Do you want to be the guinea pig in an experiment of whether the individual in question is the needle in the haystack who has "changed"?
That's very true, and everyone should remember it. Second chances are for movies and after school specials. In the real world, often there are no second chances.
It is unhealthy to hold grudges and good to forgive. But only a fool allows himself to be victimized again