To Laura in The Gate of the Sanctuary from The Temple of the Holy Ghost (Collected Works, Vol I) by Aleister Crowley.

“Dream on my breast of quiet days,
Kindled of slow absorbing fire!
Sleep, while I ponder on the ways
And secret paths of my desire!
Dream, while my restless brain probes deep
The mysteries of its magic power,
The secret of forgotten sleep,
The birth of knowledge as a flower!” [via]