Let me come back again to the waking state. I have no choice but to consider it a phenomenon of interference. Not only does the mind display, in this state, a strange tendency to lose its bearings (as evidenced by the slips and mistakes the secrets of which are just beginning to be revealed to us), but, what is more, it does not appear that, when the mind is functioning normally, it really responds to anything but the suggestions which come to it from the depths of that dark night to which I commend it.

Le Manifeste du Surréalisme (Manifesto of Surrealism; 1924)