Rabbi Nachman of Breslov revealed to us (see Lekutei Moharan 1: 272) that a person must have the fundamental trait of seeing and thinking only about this day that one has, mainly that a person should know and remember that one has “only today.”
If a person knows and remembers that one has “only today,” then the person will certainly succeed. For a person can accept very much – even more than one’s powers – if one knows it is only for one day.
It is very important to fill yourself with the knowledge that you have “only today,” for then you will see many awesome wonders, and be capable of withstanding everything.
Adapted from Mohorosh HaKodesh Breslov in Only Today: Based on the Teachings of Rabbi Nachman of Breslov and of His Student Rabbi Nossan of Breslov