"From the point of view of the moralist the animal world is on about the same level as a gladiator's show. The creatur…"

"The greater part of the substance of the following Essays has already been published in the form of Oral Discourses, …"

"Life is too short to occupy oneself with the slaying of the slain more than once."

"To a person uninstructed in natural history, his country or sea-side stroll is a walk through a gallery filled with w…"

"It is true that if philosophers have suffered their cause has been amply avenged. Extinguished theologians lie about …"

"A man has no reason to be ashamed of having an ape for his grandfather. If there was an ancestor whom I should feel s…"

"I cannot but think that he who finds a certain proportion of pain and evil inseparably woven up in the life of the ve…"

"The fact is he made a prodigious blunder in commencing the attack, and now his only chance is to be silent and let pe…"

"I do not mean to suggest that scientific differences should be settled by universal suffrage, but I do conceive that …"

"The method of scientific investigation is nothing but the expression of the necessary mode of working of the human mind."