"Alone, I often fall down into nothingness. I must push my foot stealthily lest I should fall off the edge of the world into nothingness. I have to bang my head against some hard door to call myself back to the body."

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Surely we cannot take an open question like the supernatural and shut it with a bang, turning the key of the madhouse on all the mystics of history. You cannot take the region of the unknown and calmly say that, though you know nothing about it, you know all the gates are locked. We do not know enough about the unknown to know that it is unknowable.

— Gilbert K. Chesterton