Likutei Moharan, Part II 48:4/ליקוטי מוהר"ן·תנינא מ״ח:ד׳

14. Now, it is fitting to go with that which is taught in the lesson “Azamra (I Will Sing) to My God with the Little I have Left” (Likutey Moharan I, 282) ; that is, to seek and search to find in oneself some merit and some good point. And with this little bit of good which a person finds in himself, let him rejoice and encourage himself. He should not desert his place, even if he has fallen into what he has fallen, may the Merciful One spare us. Notwithstanding, he should encourage himself with the modicum of good he still finds in himself, until he merits returning to God through this, and all the willful transgressions transform to merits (see Yoma 86b).

2[Remember,] too, what the Baal Shem Tov, may the mention of a tzaddik bring blessing, did at sea when Satan instigated against him, etc. Understand from this the extent to which you need to encourage yourself and, come what may, never give up on yourself, God forbid.

3And the main thing is to always be happy. A person should bring himself to joy in any way he can, even with silliness—playing the fool and doing silly and comical things, or jumping and dancing in order to be happy, which is a very great thing.