I weaken all men for hours each day. I show you strange visions while you are away. I take you by night, by day take you back, none suffer to have me, but do from my lack. What am I?
Answer in the comments.
And a couple more:
All that we see or seem is but a dream within a dream.
~ Edgar Allen Poe
Deep into that darkness peering, long I stood there, wondering, fearing, doubting, dreaming dreams no mortal ever dared to dream before.
~ Egdar Allen Poe, “Nevermore”
Sleep is the best meditation.
~ Dalai Lama (1989 Nobel Peace Prize)
That we are not much sicker and much madder than we are is due exclusively to that most blessed and blessing of all natural graces, sleep.
~ Aldous Huxley
I have never taken any exercise except sleeping and resting.
~ Mark Twain
There is a time for many words, and there is also a time for sleep.