ι De Somniis α Causa per Accidens from the Book of Wisdom or Folly in The Libri of Aleister Crowley
“As all diseases have two conjunct causes, one immediate, external and exciting, the other constitutional, internal, and predisposing, so it is with Dreams, which are Dis-Eases, or unbalanced States of Consciousness, Disturbers of Sleep as Thoughts are of Life.” [via]