Too much attention to health is a hindrance to learning, to invention, and to studies of any kind, for we are always feeling suspicious shootings and swimmings in our heads, and we are prone to blame studies from them.

Either we shall find what it is we are seeking or at least we shall free ourselves from the persuasion that we know what we do not know.

He is unworthy of the name of man who is ignorant of the fact that the diagonal of a square is incommensurable with its side.

The makers of fortunes have a second love of money as a creation of their own, resembling the affection of authors for their own poems, or of parents for their children, besides that natural love of it for the sake of use and profit.

So the nature required to make a really noble Guardian of our commonwealth will be swift and strong, spirited, and philosophic.

Then not only an old man, but also a drunkard, becomes a second time a child.

That politician who curries favor with the citizens and indulges them and fawns upon them and has a presentiment of their wishes, and is skillful in gratifying them, he is esteemed a great statesman.