The real tragedy of life is when men are afraid of the light.

We obtain better knowledge of a person during one hour's play and games than by conversing with him for a whole year

When the tyrant has disposed of foreign enemies by conquest...and there is nothing to fear from them, then he is always stirring up some war

How can you prove whether at this moment we are sleeping, and all our thoughts are a dream; or whether we are awake, and talking to one another in the waking state?

Beauty of style and harmony and grace and good rhythm depend on simplicity - I mean the true simplicity of a rightly and nobly ordered mind and character, not that other simplicity which is only a euphemism for folly.

By education I mean that training in excellence from youth upward which makes a man passionately desire to be a perfect citizen, and teaches him to rule, and to obey, with justice. This is the only education which deserves the name.

Let no one ignorant of Mathematics enter here.