Wise kings generally have wise counselors; and he must be a wise man himself who is capable of distinguishing one. -Diogenes Wisdom
When I look upon seamen, men of science and philosophers, man is the wisest of all beings; when I look upon priests and prophets nothing is as contemptible as man. -Diogenes Science
As a matter of self-preservation, a man needs good friends or ardent enemies, for the former instruct him and the latter take him to task. -Diogenes Good
Those who have virtue always in their mouths, and neglect it in practice, are like a harp, which emits a sound pleasing to others, while itself is insensible of the music. -Diogenes Music
