Sleep is an essential part of life-but more important, sleep is a gift.

Dreaming permits each and every one of us to be quietly and safely insane every night of our lives

Given that the dreaming brain must perform these remarkable contortions - creating a world, living in it, responding to it, and then carefully blocking all the responses in a manner that does not cross the threshold of awareness - it is no wonder that this dreaming brain seems to be more active than the waking brain.

Dreaming is the opportunity to hold a citizenship in two worlds, equally real but with different logic and limitations.

Sleep deprivation is the most common brain impairment.

We're beginning to realize that drowsiness or sleep deprivation, fatigue, is beginning to outstrip alcohol as a cause of accidents in transportation, particularly on the highway.