"The states of consciousness are all that psychology needs to do her work with. Metaphysics or theology may prove the Soul to exist; but for psychology the hypothesis of such a substantial principle of unity is superfluous."

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More often than not, nothingness is reluctantly and despairingly taken to be the only hypothesis possible when all the others have failed, since by definition it cannot be disproven and is beyond the scope of reason.

— Georges Bernanos