"Man is descended from a hairy, tailed quadruped, probably arboreal in its habits, and an inhabitant of the Old World."

"We are like a judge who has to sum up and deliver judgment, not on the evidence of witnesses, but on the arguments of counsel."

"I own that I cannot see as plainly as others do, and as I should wish to do, evidence of design and beneficence on all sides of us. There seems to me too much misery in the world. I cannot persuade my…"

"I have been much struck by the fact that the more I have read about the subject, the less I have understood it."

"There is no fundamental difference between man and the higher mammals in their mental faculties."