Those who are not angry at the things they should be angry at are thought to be fools, and so are those who are not angry in the right way, at the right time, or with the right persons.

Whatsoever that be within us that feels, thinks, desires, and animates, is something celestial, divine, and, consequently, imperishable.

The shape of the heaven is of necessity spherical; for that is the shape most appropriate to its substance and also by nature primary.

Metaphysics involves intuitive knowledge of unprovable starting-points concepts and truth and demonstrative knowledge of what follows from them.

Find the good. Seek the Unity. Ignore the divisions among us.

The true friend of the people should see that they be not too poor, for extreme poverty lowers the character of the democracy.

Nature makes nothing incomplete, and nothing in vain.