‘Abdu’l Baha explicated the allegory of the Garden of Eden in the following way (acknowledging the existence of many other symbolic meanings)
‘The tree of good and evil signifies the human world; for the spiritual and divine world is purely good and absolutely luminous, but in the human world light and darkness, good and evil, exist as opposite conditions. The meaning of the serpent is attachment to the human world. This attachment of the spirit to the human world led the soul and spirit of Adam from the world of freedom to the world of bondage and caused Him to turn from the Kingdom of Unity to the human world. When the soul and spirit of Adam entered the human world, He came out from the paradise of freedom and fell into the world of bondage. From the height of purity and absolute goodness, He entered into the world of good and evil. The tree of life is the highest degree of the world of existence: the position of the Word of God, and the supreme Manifestation. Therefore, that position has been preserved; and, at the appearance of the most noble supreme Manifestation, it became apparent and clear. For the position of Adam, with regard to the appearance and manifestation of the divine perfections, was in the embryonic condition; the position of Christ was the condition of maturity and the age of reason; and the rising of the Greatest Luminary was the condition of the perfection of the essence and of the qualities. This is why in the supreme Paradise the tree of life is the expression for the center of absolutely pure sanctity—that is to say, of the divine supreme Manifestation’.