In his lame later years, Crowley stopped doing and started proselytizing. He changed from Challenge Mode to Apologetics and Thelema-Thomism. Was he being a philosopher? Nope—he knew that ethical matters (metaphysics of morals) are higher on the Kantian scale that theoretical philosophy (metaphysics of substance, causality, and God). You cannot theorize ought from is; you can only theorize ought from ought.
Aleister Crowley," "The Law of Liberty