the past . . .
Do not regret the past. What is the use of regrets? The lie says that you should regret. The truth says that you should be filled with love. Push all sad memories away from you. Do not speak of the past. Live in the light of love, and all things will be given to you.
– Persian Wisdom
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.
(from Tolstoy a Calender of Wisdom)