The previous Lubavitcher Rebbe called this song "Der Beinoni" after the personality profile described in Tanya (the fundamental text on Chasidic philosophy): Different from the Tzaddik who, not drawn to evil, devotes himself only to drawing others to good; by far not the Rasha, enslaved to himself, his passion, his fear, satisfied with his own excuses for inaction and regression; but the Beinoni between them, the constantly fighting and endlessly winning human human.
Composed by Reb Aharon Charitonov of Nikolayev
Performed by Shoshana Michel
Another gorgeous rendition here (audio file)