There are two sides to every question.

Many things prevent knowledge, including the obscurity of the subject and the brevity of human life

Man is the measure of all things, of things that are that they are, and of things that are not that they are not.

Man is the measure of all things, of the reality of those which are, and of the unreality of those which are not.

As to the gods, I have no means of knowing either that they exist or do not exist.

There are two sides to every question.

Man is the measure of all things.