
“Knowledge is power; knowledge shared is power lost.”
This has been attributed to Crowley on the internet, but without citation. No incidents of it in Crowley's works have as yet been located.
This was quoted as an "occult tradition" in Fundamentals of Experimental Psychology (1976) by Charles Lawrence Sheridan, p. 17, but without any reference to Crowley.
Disputed
Variant: Knowledge is power and knowledge shared is power lost.