Wisdom is knowing what you don't know.

Those then who know not wisdom and virtue, and are always busy with gluttony and sensuality, go down and up again as far as the mean; and in this region they move at random throughout life, but they never pass into the true upper world; thither they neither look, nor do they ever find their way, neither are they truly filled with true being, nor do they ever taste of pure and abiding pleasure.

To Believe without evidence and demonstration is an act of ignorance and folly

True knowledge exists in knowing that you know nothing.

Not I, but the city teaches.

Improve yourself by other men's writings thus attaining effortlessly what they acquired through great difficulty.

I love to go and see all the things I am happy without.