Socrates — "The unexamined life is not worth living."

"No man has the right to be an amateur in the matter of physical training. It is a shame for a man to grow old without seeing the beauty and strength of which his body is capable."

"I examined the poets, and I look on them as people whose talent overawes both themselves and others, people who present themselves as wise men and are taken as such, when they are nothing of the sort."

"He marvelled that anyone should make money by the profession of virtue, and should not reflect that his highest reward would be the gain of a good friend."

"He who is not a good servant will not be a good master."

"And so tyranny naturally arises out of democracy, and the most aggravated form of tyranny and slavery out of the most extreme form of liberty."