This is a short Thelemic instructional text published under the copyright of Ordo Templi Orientis, written in archaic ceremonial prose in the tradition of Aleister Crowley's magical order. Its central argument is that mastery over the self — specifically over Speech, Action, and Thought, symbolized respectively as Unicorn, Horse, and Ox — is a prerequisite for spiritual advancement, framed within Kabbalistic symbolism (Tiphereth, the Crown, the Tarot arcana). The text prescribes concrete behavioral-discipline exercises: practitioners vow to avoid specific words, letters, pronouns, body movements, or trains of thought for one-week periods at a time. What makes it notably distinctive — and disturbing — is its prescribed enforcement mechanism: each time the practitioner breaks their vow, they are instructed to cut themselves on the wrist or forearm with a razor, with the rationale that the resulting marks serve as both punishment and a physical record of progress. The underlying philosophy frames this bodily coercion as paradoxically liberating ("bind thyself, and thou shalt be for ever free"), connecting self-mastery to Thelemic cosmology. This text would interest scholars of Western esotericism, the history of ceremonial magic, or researchers examining the intersection of ascetic practice and self-harm in occult traditions.