It is upon you to disregard the future completely, and certainly to forget the past which has already disappeared. If you do so, then you will experience the sweetness of life.
For you must know that in this day alone lies your chance for success, both spiritually and physically. You must make certain to do all you can today, and not postpone anything for tomorrow – for you have no tomorrow at all.
This is true in both corporeal and spiritual matters. You have only today.
Only Today: Based on the Teachings of Rabbi Nachman of Breslov and of His Student Rabbi Nossan of Breslov, by Mohorosh HaKodesh Breslov