The moral sense perhaps affords the best and highest distinction between man and the lower animals.

There is no fundamental difference between man and animals in their ability to feel pleasure and pain, happiness, and misery.

Besides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.

I believe man . . . in the same predicament with other animals.

A naked man on a naked horse is a fine spectacle. I had no idea how well the two animals suited each other.

Man's inhumanity to man is only surpassed by his cruelty to animals.