"In matching your wits against yourself you take on the shrewdest and wiliest antagonist you can have, and consequently a victorious outcome in this duel of wits brings a great feeling of triumph."

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But though every created thing is, in this sense, a mystery, the word mystery cannot be applied to moral truth, any more than obscurity can be applied to light. ... Mystery is the antagonist of truth. It is a fog of human invention, that obscures truth, and represents it in distortion. Truth never envelops itself in mystery, and the mystery in which it is at any time enveloped is the work of its antagonist, and never of itself.

— Thomas Paine