“Les hommes construisent trop de murs et pas assez de ponts. ”

“Deus é capaz de criar partículas de matéria de diversos tamanhos e formas...e talvez de diferentes densidades e forças e, portanto, de variar as leis da natureza e fazer mundos de diversos tipos em várias partes do universo. Pelo menos não vejo contradição alguma em tudo isso.”

“What goes up must come down.”

“Los hombres construimos demasiados muros y no suficientes puentes.”

“If I have seen further it is by standing on the shoulders of Giants.”

“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.”

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