Isaac Newton

"Tact is the art of making a point without making an enemy."

"Errors are not in the art but in the artificers."

"I was like a boy playing on the sea-shore, and diverting myself now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me."

"If I have done the public any service, it is due to my patient thought."

"To me there has never been a higher source of earthly honor or distinction than that connected with advances in science."

"To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me."