"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 seashore, 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."
"We build too many walls and not enough bridges."
"If I have seen further than others, it is by standing upon the shoulders of giants.
"I can calculate the motion of heavenly bodies, but not the madness of people."