A tree from The Garden of Eden whose fruit was purported to grant immortality. Not to be confused with the other important tree from the Garden of Eden, The Tree of the Knowledge of Good and Evil. It was the latter whose fruit was eaten by Adam and Eve.

A network diagram studied in the Kabala consisting of ten nodes and twenty-two edges or paths connecting them. The ten nodes are numbered one to ten and each is assigned a set of characteristics which form the basis of numerology. The twenty-two paths are each assigned a letter of the Hebrew alphabet. The Golden Dawn made further correspondences between the paths and the the twenty-two cards of the Major Arcana of the Tarot deck and the planets, signs and elements of astrology.

The Tree of Life is not a tree in the network-theory sense of the word.