Make certain to fill your mind with the fact that you have “only today.” For then you will perceive how each day will pass in an entirely different fashion.
If a person is constantly concentrating on tomorrow, he will in the interim waste and misuse the time that he has. His thoughts will center on the belief that “there is always time until tomorrow.”
He wastes all of today, and it disappears without anything done.
Only Today: Based on the Teachings of Rabbi Nachman of Breslov and of His Student Rabbi Nossan of Breslov, by Mohorosh HaKodesh Breslov