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

The question is not can animals speak but can they suffer.

The request of industry to government is as modest as that of Diogenes to Alexander: Get out of my light.

It is with government as with medicine, its only business is the choice of evils. Every law is an evil, for every law is an infraction of liberty.

The day may come when the rest of the animal creation may acquire those rights which never could have been withholden from them but by the hand of tyranny.

Nature has placed mankind under the government of two sovereign masters, pain and pleasure... they govern us in all we do, in all we say, in all we think: every effort we can make to throw off our subjection, will serve but to demonstrate and confirm it.

The said truth is that it is the greatest happiness of the greatest number that is the measure of right and wrong.