Sleep

For doe but consider what an excellent thing sleepe is: It is so inestimable
a Jewel, that, if a Tyrant would give his crowne for an houres slumber, it
cannot be bought: of so beautifull a shape is it, that though a man lye with
an Empresse, his heart cannot be at quiet, till he leaves her embracements
to be at rest with the other: yea, so greatly indebted are we to this
kinseman of death, that we owe the better tributary, halfe of our life to
him : and there good cause why we should do so : for sleepe is that golden
chaine that ties health and our bodies together.

T. Deckar.
http://leehrsn.stormloader.com/dek/text.html#ii