Each of the Sephirot consists of a "light" (an "ohr") that is vested in a "vessel" (a "kli"; plural keilim). This light is simple, pure and undifferentiated, as it originally flows from the Ohr Ein Sof ("The Light of the Ein Sof"), God's infinite light. It represents Divine revelation in the world. It is associated with the Kabbalistic Divine name of Ban. The differentiation between the 10 Sephirot, each with its own particular characteristic, arises from each of their different spiritual vessels. The light adapts itself to each vessel, to express the particular nature of each vessel.
Kabbalists read their mystical teachings into exegetical interpretations of scripture and Rabbinic literature. This arose from their belief that Kabbalah forms part of the Oral Torah inherent in the revelation at Mount Sinai. Consequently, in Jewish tradition, each verse and concept can be interpreted in the fourfold Jewish method of Pardes , with the metaphysical interpretations of Kabbalah and Hasidic philosophy forming the Sod (secret) level of meaning. In this way, Kabbalah interprets a second meaning in Talmudic legislation and use of the term for "vessel" (kli).
In the Hasidic sense a vessel is an object that can serve a useful purpose, even if it may not resemble a physical receptacle. This term is used frequently in discussion of the laws of Shabbat . In Jewish mysticism, typically, these narratives are given metaphysical interpretations, which relate "kli" to its Kabbalistic meaning.
In Hasidic philosophy, the plural fourfold levels of meaning are viewed as uniting in a higher essential source of explanation that describes Divinity. Jewish mysticism views such alternative, spiritual interpretations of Torah as stemming from more revealed Divine realms in the Chain of Worlds.