If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle
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How came the bodies of animals to be contrived with so much art, and for what ends were their several parts?
Was the eye contrived without skill in Opticks, and the ear without knowledge of sounds?...and these things being rightly dispatch’d, does it not appear from phnomena that there is a Being incorporeal, living, intelligent...?
Isaac Newton