Man in his arrogance thinks himself a great work.

Man in his arrogance thinks himself a great work, worthy of the interposition of a deity. More humble, and I believe truer, to consider him created from animals.

It is mere rubbish thinking, at present, of origin of life; one might as well think of origin of matter.

Man, wonderful man, must collapse, into nature's cauldron, he is no deity, he is no exception.

He who is not content to look, like a savage, at the phenomena of nature as disconnected, cannot any longer believe that man is the work of a separate act of creation ... Man is the co-descendant with other mammals of a common progenitor.

No doubt as long as man and all other animals are viewed as independent creations, an effectual stop is put to our natural desire to investigate as far as possible the causes of Expression.