Don't engage your heart in grief over the past or you wont be ready for what is coming.
Ali ibn Abi TalibThe relation of patience to iman is like the relation of the head to the body. If the head is chopped off, the body becomes useless. Then he raised his voice and said: Certainly, the one who has no patience has no iman, and patience is like a riding-beast that nevers gets tired
Ali ibn Abi Talib