"Gravity explains the motions of the planets, but it cannot explain who sets the planets in motion."
"I know not how I seem to others, but to myself I am but a small child wandering upon the vast shores of knowledge, every now and then finding a small bright pebble to content myself with while the vast ocean of undiscovered truth lay before me."
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Source: Never at Rest: A Biography of Isaac Newton. Book by Richard S. Westfall, p. 643, 1983.
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