The tree of life is a term mentioned in the Hebrew Bible. In the Book of Genesis, the tree of life is first described in as being "in the midst of the Garden of Eden" with the tree of the knowledge of good and evil. After the fall of man, "lest he put forth his hand, and take also of the tree of life, and eat, and live for ever", cherubim are placed at the east end of the Garden to guard the way to the tree of life. The tree of life has become the subject of some debate as to whether or not the tree of the knowledge of good and evil is the same tree. In the Bible outside of Genesis, the term "tree of life" appears in Proverbs and Revelation. It also appears in 2 Esdras and 4 Maccabees, which are included among the Jewish apocrypha.
In The City of God, Augustine of Hippo offers great allowance for "spiritual" interpretations of the events in the garden, so long as such allegories do not rob the narrative of its historical reality. Enlightenment theologians sought for figurative interpretations because they had already dismissed the historical possibility of the story. Others sought very pragmatic understandings of the tree. In the Summa Theologica, Thomas Aquinas argued that the tree served to maintain Adam's biological processes for an extended earthly animal life. It did not provide immortality as such, for the tree, being finite, could not grant infinite life. Hence after a period of time, the man and woman would need to eat again from the tree or else be "transported to the spiritual life." The common fruit trees of the garden were given to offset the effects of "loss of moisture", while the tree of life was intended to offset the inefficiencies of the body. Following Augustine in the City of God, “man was furnished with food against hunger, with drink against thirst, and with the tree of life against the ravages of old age.” John Calvin, following a different thread in Augustine, understood the tree in sacramental language. Given that humanity cannot exist except within a covenantal relationship with God, and all covenants use symbols to give us "the attestation of his grace", he gives the tree, "not because it could confer on man that life with which he had been previously endued, but in order that it might be a symbol and memorial of the life which he had received from God." God often uses symbols - He doesn’t transfer his power into these outward signs, but "by them He stretches out His hand to us, because, without assistance, we cannot ascend to Him." Thus he intends man, as often as he eats the fruit, to remember the source of his life, and acknowledge that he lives not by his own power, but by God's kindness. Calvin denies that the tree served as a biological defense against physical aging. This is the standing interpretation in modern Reformed theology as well.
Judaism
According to Jewish mythology, in the Garden of Eden there is a tree of life or the "tree of souls" that blossoms and produces new souls, which fall into the Guf, the Treasury of Souls. The Angel Gabriel reaches into the treasury and takes out the first soul that comes into his hand. Then Lailah, the Angel of Conception, watches over the embryo until it is born.
The tree of life is represented in several examples of sacred geometry and is central in particular to the Kabbalah, where it is represented as a diagram of ten points. The ten points are known as Sephiroth or Sephirah, or the ten emanations or attributes of God. Kabbalah is an esoteric method, discipline and school of thought in Jewish mysticism.
