In a famous work of kabbalistic commentary, the Sefer Ḥasidim, each organ and limb is associated with the 613 commandments of the Torah. Each commandment thus corresponds to a specific part of the body. Man is an array of lights and each mitzva gives off its own small light. Our lives consist of lighting one light here, one light there, and all these lights together make up a human being , the ideal image of the person, as though man were merely a brace, or a stand, for the 613 lights.
From The Seven Lights, page 340