Every great genius has an admixture of madness.

Beauty is a gift of God.

... There must then be a principle of such a kind that its substance is activity.

It is the mark of an educated mind to expect that amount of exactness which the nature of the particular subject admits. It is equally unreasonable to accept merely probable conclusions from a mathematician and to demand strict demonstration from an orator.

In part, art completes what nature cannot elaborate; and in part it imitates nature.

In the Laws it is maintained that the best constitution is made up of democracy and tyranny, which are either not constitutions at all, or are the worst of all. But they are nearer the truth who combine many forms; for the constitution is better which is made up of more numerous elements. The constitution proposed in the Laws has no element of monarchy at all; it is nothing but oligarchy and democracy, leaning rather to oligarchy.

Hippocrates is an excellent geometer but a complete fool in everyday affairs.