"The mathematical difficulties of the subject are so enormous that it is only by great patience and perseverance that we can hope to overcome them."

"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."

"The properties of the ether, if it exists, are certainly very remarkable."

"I saw a rat today in the college garden, and I thought how much more pleasant it would be to be a rat than a professor."

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