That some are poorer than others, ever was and ever will be: And that many are naturally querulous and envious, is an Evil as old as the World.
William PettyNo man pays double or twice for the same thing, forasmuch as nothing can be spent but once.
William PettyHere we are to remember that in consequence of our opinion that labor is the Father and active principle of wealth, as lands are the Mother, that the state by killing, mutilating, or imprisoning their members do withal punish themselves.
William Petty