What goes up must come down. - Isaac Newton

"Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things."

"I can calculate the motion of heavenly bodies but not the madness of people."

"I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me."

"My powers are ordinary. Only my application brings me success."

"Nature is pleased with simplicity. And nature is no dummy"