Sympathy beyond the confines of man, that is, humanity to the lower animals, seems to be one of the latest moral acquisitions.

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

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

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

The man with a new idea is a Crank until the idea succeeds.

Man has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.