θ Quo Modo Natura Sua est Legenda from the Book of Wisdom or Folly in The Libri of Aleister Crowley

“Consider well thy conscious Thoughts and Acts, for they are under the Dominion of thy Will, and moved in Accord with the Operation of thy Reason; this indeed is a necessary work, enabling to comprehend in what manner thou mayst adjust thyself to thine Environment.” [via]