Men's moral principles are weak enough without their being made subordinate to selfishness; and their selfishness is quite active enough, without any such effort as Christianity makes to constitute it the mainspring of all their conduct.
The Complete Works of Lysander Spooner: The Unconstitutionality of Slavery, No Treason: The Constitution of No Authority, Vices are Not Crimes, Natural ... Laws of Congress, Prohibiting Private Mails