The biological clock is responsive to light at certain times, ... Bright light in the morning will tend to advance the clock. In other words, alertness will occur earlier and sleep will occur earlier.

150

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

142

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.

137