155–156
Socrates
SOC. And will you be grateful to me if I help you to search out the hidden truth of the thought of a famous man or, I should say, of famous men?
Theaetetus
THEAET. Of course I shall be grateful, very grateful.
Socrates
SOC. Look round and see that none of the uninitiated is listening. The uninitiated are those who think nothing is except what they can grasp firmly with their hands, and who deny the existence of actions and generation and all that is invisible.
Theaetetus
THEAET. Truly, Socrates, those you speak of are very stubborn and perverse mortals.