What goes up must come down. - Isaac Newton

"Les hommes construisent trop de murs et pas assez de ponts."

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

"Lo que sabemos es una gota de agua; lo que ignoramos es un océano."

"If I have seen further than others, it is by standing upon 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."