When feeling sad, do not focus on spiritual highs (prayer or mysticism). Focus on rigorous, logical study. The cold hard facts of Halacha drive out the hot fog of melancholy. 2. The Strategy of "Letzalzel" (Jumping and Clapping) Perhaps the most famous directive in Tanya 157 is the instruction to physically "jump and clap hands" ( Letzalzel b’kapayim ), even if you don't feel like it.
This is not denial; it is spiritual defiance. Modern psychology (specifically Cognitive Behavioral Therapy) echoes the principles of Tanya 157 centuries later. The concept that "actions influence emotions" (behavioral activation) is the foundation of treating depression.
The Alter Rebbe writes to a disciple who is suffering from "heaviness of the heart" ( Koved HaLev ), a state the Rebbe argues is worse than any physical ailment or even spiritual sin. The central verse anchoring Tanya 157 is from Psalms 100:2: "Ivdu et Hashem b’simcha" — "Serve God with joy." tanya 157
While most understand this as a commandment to be happy while praying or studying, the Alter Rebbe provides a radical reinterpretation:
Tanya 157 commands the person to develop Azut d’Kedusha —a holy audacity. The person must say to the darkness: "I don't care how I feel. Regardless of the logic in my head, I know the truth. I will serve God with joy even if I have to scream it out loud." When feeling sad, do not focus on spiritual
For further study, explore the daily Tanya study cycle (Chitas) which covers Chapter 157 usually in the mid-summer months (approx. 19 Tamuz).
In Chapter 157, the Alter Rebbe rules that sadness is not just a bad mood; it is a form of spiritual paralysis. He argues that the Sitra Achra (the "other side" or force of evil) has no power over a person who is genuinely happy. Conversely, when a person is sad, their spiritual defenses collapse. Therefore, breaking out of sadness is not optional; it is a mitzvah (commandment). To explain why we feel sad, Tanya 157 introduces a famous Kabbalistic metaphor regarding the Tzimtzum (Divine contraction). To explain why we feel sad
The Alter Rebbe was not ignoring the reality of pain. He was validating it. He calls the sadness a "great battle" ( Milchamah Gedolah ). He acknowledges that for the sufferer, this battle is harder than fasting or self-mortification.