When he was asked which was the right way, the path of sorrow or the path of joy, the rabbi of Berdichev said:
There are two kinds of sorrow and two kinds of joy. When a person broods over the misfortunes that have come upon him, when he cowers in a corner and despairs of help—that is a bad kind of sorrow, concerning which it is said, “The Divine Presence does not dwell in a place of dejection.” The other kind is the honest grief of a person who knows what he lacks.
The same is true of joy. He who is devoid of inner substance and, in the midst of empty pleasures, does not feel it, nor tries to fill his lack, is a fool. But he who is truly joyful is like a person whose house has burned down, who feels his need deep in his soul and begins to build anew. Over every stone that is laid, his heart rejoices.