Sanus est, qui scit quid sit insania, quippe insania scire se non potest, non magis quam caecitas se videre. - Apuleius

And in that day men will be weary of life, and they will cease to think the universe worthy of reverent wonder and of worship. And so religion, the greatest of all blessings, for there is nothing, nor has been, nor ever shall be, that can be deemed a greater boon, will be threatened with destruction; men will think it a burden, and will come to scorn it.

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.

Accessi confinium mortis et calcato Proserpinae limine per omnia vectus elementa remeavi, nocte media vidi solem candido coruscantem lumine, deos inferos et deos superos accessi coram et adoravi de proximo.