I met another man who considered himself perfect, but he was thoroughly mad; and I do not believe that any of the pretenders to perfection are better than good maniacs... for while a man has got a spark of reason left in him, he cannot, unless he is the most impudent of impostors, talk about being perfect.

Sermons Preached and Revised by the Rev. C. H. Spurgeon, Fifth Series. New York, Sheldon (ed. 1859)