"We must, however, acknowledge as it seems to me, that a man with all his noble qualities...still bears in his bodily frame the indelible stamp of his lowly origin."

"We can allow satellites, planets, suns, universe, nay whole systems of universes, to be governed by laws, but the smallest insect, we wish to be created at once by special act."

"The highest possible stage in moral culture is when we recognize that we ought to control our thoughts."

"An American Monkey after getting drunk on Brandy would never touch it again, and thus is much wiser than most men."

"The fact of evolution is the backbone of biology, and biology is thus in the peculiar position of being a science founded on an improved theory, is it then a science or faith?"

"A scientific man ought to have no wishes, no affections, -- a mere heart of stone."

"No fine work can be done without concentration and self-sacrifice and toil and doubt."

"After the greatest clouds, the sun."

"Nietsche is Pietsche.'"

"There is nothing in the world that some man cannot make a little worse and sell a little cheaper, and he who considers price only is that man's lawful prey."

"And miles to go before I sleep, And miles to go before I sleep."

"Anxiety is the dizziness of freedom."