I don't care whether animals are capable of thinking; all I care about is that they are capable of suffering!

Nature has placed mankind under the government of two sovereign masters, pain and pleasure.

The turn of a sentence has decided the fate of many a friendship, and, for aught that we know, the fate of many a kingdom.

Every law is an infraction of liberty.

I don't care whether animals are capable of thinking; all I care about is that they are capable of suffering!

All punishment is mischief; all punishment in itself is evil.

...the rarest of all human qualities is consistency.