From Liber Aleph, Chs. Wq-Wr.
Now the Path of Ayin is a Link between Mercury and the Sun, and in the Zodiac importeth the Goat. This Goat is called also Strength, and standeth in the Meridian at the Sunrise of Spring; and it is His Nature to leap upon the Mountains. So therefore he is a Symbol of true Magick, and his Name is Baphomet, wherefore did I design him as an Atu of Thoth, the Fifteenth, and put his Image in the Front of my Book, The Ritual of High Magick, which was the second Part of my Thesis for the Grade of Major Adept, when I was clothed about with the Body called Alphonse Louis Constant. Now the Goat flieth not as doth the Eagle; but consider this also that it is the true Nature of Man to dwell upon the Earth, so that his Flights are oft but Phantasy; yea, the Eagle also is bound to his Eyrie, nor feedeth upon Air. Therefore this goat, making each leap with Fervour, yet all Times secure in his own Element, is a true Hieroglyph of the Magician. Mark also, this Path sheweth One continuous in Exaltation upon a Throne, and so is it the Formula of the Man, as the other was of the Woman.
I say furthermore that this Path is of the Circle, and of the Eye of Horus that sleepeth not, but is vigilant. The Circle is all-perfect, equal every Way, but the Vesica hath bitter Need, and seeketh thy Medicine, that is of right compounded for High Purpose, to ease her Infirmity. Thus is thy Will frustrated, and thy Mind distracted, and thy Work lamed, if it be not brought to Naught. Also thy Puissance in thine Art is minished, by a full Moiety, as I do esteem it. But the Eye of Horus hath no Need, and is free in his Will, not seeking a Level, or requiring a Medicine, and is fit and worthy to be the Companion and the Ally of thee in thy Work, as a Friend to thee, not Mistress and not Slave, that seek ever with Slyness and Deceit to encompass their own Ends. There is moreover a Reason in Physics for my Word; study thou this matter in the Laws of the Changes of Nature. For Things Unlike do in their Marriage produce a Child which is relatively Stable, and resisteth Change; but Things like increase mutually the Potential of their particular Natures. Howbeit, each Path hath his own Use; and thou, being instructed in all Ways, choose thine with Discretion.