When Demosthenes was asked what were the three most important aspects of oratory, he answered, 'Action, Action, Action.'

There are two sentences inscribed upon the Ancient oracle... "Know thyself" and "Nothing too much"; and upon these all other precepts depend.

Euripides was wont to say, silence was an answer to a wise man; but we seem to have greater occasion for it in our dealing with fools and unreasonable persons; for men of breeding and sense will be satisfied with reason and fair words.

For to err in opinion, though it be not the part of wise men, is at least human.

So long as he was personally present, [Alcibiades] had the perfect mastery of his political adversaries; calumny only succeeded in his absence.

Both Empedocles and Heraclitus held it for a truth that man could not be altogether cleared from injustice in dealing with beasts as he now does.

Friendship is the most pleasant of all things, and nothing more glads the heart of man.