Isaac Newton — "Plato is my friend, Aristotle is my friend, but my greatest friend is truth."

"The particles of light are exceedingly small, and move with exceeding swiftness."

"The way to chastity is not to struggle directly with incontinent thoughts but to avert the thoughts by some employment, or by reading, or by meditating on other things."

"If I have seen further than others, it is by standing upon the shoulders of giants."

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

"We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances."