Some of the best lessons we ever learn are learned from past mistakes. The error of the past is the wisdom and success of the future.
It is important to live each day with a positive perspective. It is not wise to pretend problems do not exist, but it is wise to look beyond the problem to the possibilities that are in it. When Goliath came against the Israelites, the soldiers all thought, 'He's so big, we can never kill him.' But David looked at the same giant and thought, 'He's so big, I can't miss him.
In all the work we do, our most valuable asset can be the attitude of self-examination. It is forgivable to make mistakes, but to stand fast behind a wall of self-righteousness and make the same mistake twice is not forgivable.