“But he who knows what insanity is, is sane; whereas insanity can no more be sensible of its own existence, than blindness can see itself.”
Sanus est, qui scit quid sit insania, quippe insania scire se non potest, non magis quam caecitas se videre.
“It is with life just as with swimming; that man is the most expert who is the most disengaged from all encumbrances.”
Ad vivendum velut ad natandum is melior qui onere liberior.
Apologia; seu, Pro Se de Magia (Apologia; or, A Discourse on Magic), ch. 21; p. 268.