Tanya: The Kabbalah of You #12 - Chapter 4 pt. 1

Essential to every living being is the need to express themself. And so the Divine Soul possesses three mediums of expression, termed "Garments": thought, speech, and action.   

Just as garments express the person garbed within, the soul expresses its intellectual and emotional relationship with G-d via the 613 Mitzvos of the Torah in thought, speech, and action.

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