Every man is guilty of all the good he did not do. Voltaire
Regret for the things we have done will be tempered by time. It is regret for the things we did not do that is inconsolable. Sydney J. Harris
Things said or done long years ago Or things I did not do or say But thought that I might say or do, Weigh me down, and not a day But something is recalled, My conscience or my vanity appalled. William Butler Yeats
Guilt is anger directed at ourselves - at what we did or did not do. Resentment is anger directed at others - at what they did or did not do. Peter McWilliams
I deserve respect for the things I did not do. Dan Quayle
One of the great truths of life: I did not do it alone. I had help along the way. Ben Carson