“No man's knowledge here can go beyond his experience”, “Liberty consists in doing what one desires”, “There is only one good, knowledge, and one evil, ignorance”,
“If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things”, “One cannot conceive anything so strange and so implausible that it has not already been said by one philosopher or another”
“If men were born free, they would, so long as they remained free, form no conception of good and evil”, “It is one thing to show a man that he is in error, and another to put him in possession of truth”, .
“The unexamined life is not worth living”, We are what we repeatedly do. Excellence, then, is not an act, but a habit”, “That man is wisest who, like Socrates, realizes that his wisdom is worthless”, “The greater the difficulty, the more glory in surmounting it”, The brave man is he who overcomes not only his enemies but his pleasures”