Man is the only trained animal who expects his reward before he does his trick. – Robert Brault, rbrault.blogspot.com

Man, when he is merely what he seems to be, is almost nothing. – Antonio Porchia, Voces, 1943, translated from Spanish by W.S. Merwin

I demand of you, and of the whole world, that you show me a generic character… by which to distinguish between Man and Ape. I myself most assuredly know of none. – Carl Linnaeus, 1788