It was Plato, according to Sosigenes, who set this as a problem for those concerned with these things, through what suppositions of uniform and ordered movements the appearances concerning the movements of the wandering heavenly bodies could be preserved.

When the citizens of a society can see and hear their leaders, then that society should be seen as one.

To escape from evil we must be made as far as possible like God; and the resemblance consists in becoming just and holy and wise.

. . . the triumph of my art is in thoroughly examining whether the thought which the mind of the young man brings forth is a false idol or a noble and true birth.

The excessive increase of anything causes a reaction in the opposite direction.

Arithmetic is a kind of knowledge in which the best natures should be trained, and which must not be given up.

God is truth and light his shadow.