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Sefirah (pl. sefirot) is a channel of Divine energy or life-force. This most fundamental concept of Kabbalah is that in the process of creation an intermediate stage was emanated from God's infinite light to create what we experience as finite reality. These channels are called the Ten Sefirot, Ten Divine Emanations, Ten Divine Radiances, Ten Divine Eluminices, or Ten Divine Powers which are the basic terms and concepts of the inner wisdom of the Torah which is called Kabbalah.

It is via the sefirot that God interacts with creation.

Sefirot are composed of "lights" and "vessels." The light of any sefirah is the Divine flow within it; the vessel is the identity that flow takes in order to relate to or create some aspect of the world in a specific way. Inasmuch as a reality is created by means of the sefirot, they constitute the conceptual paradigm for understanding all reality.