Sleep is essential.
Quotes to consider:
“Sleep is the best Dalai Lama.” –
“I wasn’t really asleep I was just meditating on.” – Unknown
“There is only one thing people like that is good for them; a good night’s sleep” – Edgar Watson Howe
“Many things – such as loving, going to sleep, or behaving unaffectedly – are done worst when we try hardest to do them.” – C.S. Lewis