Man is the measure of all things, of things that are that they are, and of things that are not that they are not.
There are two sides to every question.
As to the gods, I have no means of knowing either that they exist or do not exist.
Many things prevent knowledge, including the obscurity of the subject and the brevity of human life
Man is the measure of all things.
Everyone, including the Athenians [...] are right to accept advice from anyone, since it is incumbent on everyone to share in that sort of excellence, or else there can be no city at all.