Sleep is the best meditation.
Dalai Lama

It is a common experience that a problem difficult at night is resolved in the morning after the committee of sleep has worked on it.
John Steinbeck

I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... such emotions make a man forget food, sleep, friends, love, everything.
Nikola Tesla

The woods are lovely, dark and deep. But I have promises to keep, and miles to go before I sleep.
Robert Frost

When I woke up this morning my girlfriend asked me, 'Did you sleep good?' I said 'No, I made a few mistakes.'
Steven Wright