“Like a Xenopilus” is a cryptic phrase that appears as a magical image on Path 18 of the Tree of Life in Crowley’s Liber 777. The term “Xenopilus” is not a classical Greek or Latin word; it appears to be a neologism, likely derived from Greek xenos (“stranger, foreign”) and pilos (“felt cap” or “close-fitting cap”), thus suggesting something like “stranger with a cap” or “foreign-capped one.” The phrase is deliberately obscure, evoking a sense of alienness or otherness in the context of magical imagery.

Position on the Tree of Life

This image corresponds to Path 18, which connects the Sephirah Binah (Understanding) to Tiphareth (Beauty) via the 18th path of the Yetziratic system. This path is attributed to the zodiacal sign of Cancer, the Moon’s domicile, and carries themes of hiddenness, receptivity, and the threshold between the supernal and the middle pillars.

Astrological and planetary correspondence

Path 18 is governed by Cancer, a cardinal water sign ruled by the Moon. The image’s strangeness aligns with Cancer’s association with the mysterious, the lunar, and the protective—like a creature that is both familiar and alien, wearing a cap that might symbolize concealment or a shell.

Historical context

The phrase “Like a Xenopilus” appears in Liber 777 (Col. CLVII, row 18) as a magical image for this path. It is not found in earlier grimoires or classical sources; it was likely coined by Crowley or his circle to evoke a sense of the uncanny. The term may be a playful or deliberate corruption, perhaps referencing the xenopilus as a type of felt cap worn by foreigners in ancient Greece, or as a pun on “xenophile” (lover of strangers). The image is meant to be visualized as a strange, cap-wearing entity—an outsider figure that guards or mediates the path from Binah to Tiphareth. This aligns with the path’s function as a bridge between the formless understanding of Binah and the harmonizing beauty of Tiphareth, requiring the magician to confront the alien or the unfamiliar within.

In the context of 777, this image stands alongside other Path 18 correspondences such as the plant Artemisia (mugwort) and the scent of Onycha, reinforcing themes of lunar mystery and boundary-crossing. The “Xenopilus” thus serves as a visual key for the magician to embody or encounter the “stranger” that dwells at the threshold of consciousness.