It is not enough that you understand in what ignorance man and beast live; you must also have and acquire the will to ignorance. You need to grasp that without this kind of ignorance life itself would be impossible, that it is a condition under which alone the living thing can preserve itself and prosper: a great, firm dome of ignorance must encompass you.

From Friedrich Nietzsche’s The Will to Power, New York: Vintage Books, 1968, p. 328.