"The velocity of light is a quantity of which we have now a more accurate knowledge than of any other physical constant."

"The world may be utterly crazy, and life may be labour in vain; But I'd rather be silly than lazy, and would not quit life for its pain."

"It is a perfect pleasure to think of anything that is not connected with the examination."

"Thoroughly conscious ignorance is the prelude to every real advance in science."

"The human mind is seldom satisfied, and is certainly never exercising its highest functions, when it is doing the work of a calculating machine."