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

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

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

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

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

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