"It is a cursed evil to any man to become so absorbed in any one subject as I am in mine."

"I have always maintained that, in this country, a man can do whatever he likes, provided he is a gentleman."

"I have just finished my 'Origin,' and am now going to be a hermit for the rest of my life."

"Man tends to increase at a greater rate than his means of subsistence."

"Ultimately, the universe must be the outcome of chance."