The Tree of Life (Etz Chaim) consists of ten spheres called sefirot β Keter, Chokmah, Binah, Chesed, Gevurah, Tiferet, Netzach, Hod, Yesod and Malkuth β arranged in a fixed pattern across three vertical columns, and connected by twenty-two paths corresponding to the twenty-two letters of the Hebrew alphabet. A frequently included eleventh point, Da'at ("knowledge"), is not a true sefirah but a marked absence β the place where hidden or unconscious knowledge is said to sit, often drawn as a dotted or hollow circle rather than a solid one.
The three columns carry their own structural meaning: the right pillar (Chokmah, Chesed, Netzach) is associated with expansive, active force; the left pillar (Binah, Gevurah, Hod) with restrictive, formative force; and the central pillar (Keter, Tiferet, Yesod, Malkuth) with the balance and reconciliation of the two. Read as a whole, the diagram is not simply a list of ten concepts but a single interconnected structure β no sefirah can be fully understood without its position relative to all the others.