Whether we will philosophize or we won't philosophize, we must philosophize.

Thus then a single harmony orders the composition of the whole...by the mingling of the most contrary principles.

A friend of everyone is a friend of no one

The knowledge of the soul admittedly contributes greatly to the advance of truth in general, and, above all, to our understanding of Nature, for the soul is in some sense the principle of animal life.

A human being is a naturally political [animal].

All friendly feelings toward others come from the friendly feelings a person has for himself.

Whether if soul did not exist time would exist or not, is a question that may fairly be asked; for if there cannot be someone to count there cannot be anything that can be counted, so that evidently there cannot be number; for number is either what has been, or what can be, counted.