The Tree of Life is an important symbol in nearly every culture. With its branches reaching into the sky, and roots deep in the earth, it dwells in three worlds- a link between heaven, the earth, and the underworld, uniting above and below. It is both a feminine symbol, bearing sustenance, and a masculine, visibly phallic symbol; another union.
In Jewish and Christian mythology, a tree sits at the center of both the Heavenly and Earthly Edens. The Norse cosmic World Ash, Ygdrassil, has its roots in the underworld while its branches support the abode of the Gods. The Egyptian’s Holy Sycamore stood on the threshold of life and death, connecting the worlds. To the Mayas, it is Yaxche, whose branches support the heavens.
The tree has other characteristics which lend easily to symbolism. Many trees take on the appearance of death in the winter- losing their leaves, only to sprout new growth with the return of spring. This aspect makes the tree a symbol of resurrection, and a stylized tree is the symbol of many resurrected Gods.
A tree also bears seeds or fruits, which contain the essence of the tree, and this continuous regeneration is a potent symbol of immortality. It is the fruit of a tree that confers immortality. This tree and its gifts of immortality are not easy to discover. It is historically difficult to find, and almost invariably guarded. The tree of Life in the Jewish bible is guarded by a Seraph (an angel in the form of a fiery serpent) bearing a flaming sword.