Human nature is universally frail; his is no exception. Nevertheless, if he is appalled at his mistakes, if this anguish is doubled because what he has done wrongly is irreparable, is there nothing else left to do than to give himself up to helpless despair? The true answer is more hopeful than that. "I know that if I keep patient while cultivating humility and silencing the ego's pride, I shall grow away from old weaknesses and overcome former mistakes"--this should be the first stage of his new attitude. For the next one, he can at least go over the events of the past and amend them in thought. He can put right mentally those wrong decisions and correct those rash impulsive actions. He can collect the profits of lessons expensively learnt.
-- Notebooks Category 6: Emotions and Ethics > Chapter 1: Uplift Character > # 448