Man is the measure of all things, of things that are that they are, and of things that are not that they are not.
ProtagorasMany things prevent knowledge, including the obscurity of the subject and the brevity of human life
ProtagorasMan is the measure of all things, of things that are that they are, and of things that are not that they are not.
ProtagorasMany things prevent knowledge, including the obscurity of the subject and the brevity of human life
Protagoras