Hindsight is always twenty-twenty.
Billy Wilder (1906 - )
I was thrown out of college for cheating on the metaphysics exam; I looked into the soul of the boy sitting next to me.
Woody Allen (1935 - )
Men never do evil so completely and cheerfully as when they do it from a religious conviction.
Blaise Pascal (1623 - 1662)
Mistakes are a part of being human. Appreciate your mistakes for what they are: precious life lessons that can only be learned the hard way. Unless it's a fatal mistake, which, at least, others can learn from.
Al Franken, "Oh, the Things I Know", 2002