Hippocrates

For extreme illnesses extreme treatments are most fitting.

Many admire, few know.

A wise man should consider that health is the greatest of human blessings, and learn how by his own thought to derive benefit from his illnesses.

Things that are holy are revealed only to men who are holy.

Idleness and lack of occupation tend-nay are dragged-towards evil.

If for the sake of a crowded audience you do wish to hold a lecture, your ambition is no laudable one, and at least avoid all citations from the poets, for to quote them argues feeble industry.