"The dove, accepted by Christianity as the emblem of the Holy Ghost, is an extremely ancient and highly revered pagan yonic emblem. In many of the ancient Mysteries it represented the third person of the Creative Triad, or the Fabricator of the world. As the lower worlds were brought into existence through a generative process, so the dove has been associated with those deities identified with the procreative functions. It is sacred to Astarte, Cybele, Isis, Venus, Juno, Mylitta, and Aphrodite. On account of its gentleness and devotion to its young, the dove was looked upon as the embodiment of the maternal instinct. The dove is also an emblem of wisdom, for it represents the power and order by which the lower worlds are maintained. It has long been accepted as a messenger of the divine will, and signifies the activity of God. It is significant that in the pagan Mysteries the dove of Venus was crucified upon the four spokes of a great wheel, thus foreshadowing the mystery of the crucified Lord of Love. Although Mohammed drove the doves from the temple at Mecca, occasionally he is depicted with a dove sitting upon his shoulder as the symbol of divine inspiration. In ancient times the effigies of doves were placed upon the heads of scepters to signify that those bearing them were overshadowed by divine prerogative. In mediæval art, the dove frequently was pictured as an emblem of divine benediction."
Who was, or rather who is Hermes Trismegistus? In answer to this question one can of course visualize an exalted divine envoy. There is no objection to this as long as you do not think of one historical person but rather of a number of envoys. For, according to the custom of the ancients, powers and manifestations were symbolically indicated as gods in a human form.