I really don't think life is about the I-could-have-beens. Life is only about the I-tried-to-do. I don't mind the failure but I can't imagine that I'd forgive myself if I didn't try.
“To preach the Gospel requires that the preacher should believe that he is sent to those whom he is addressing at the moment, because God has among them those whom He is at the moment calling; it requires that the speaker should expect a response.”