“But those who say they hate slavery, and are opposed to it, where are they? Let us apply a few tests.
You say that you think slavery is wrong, but you denounce all attempts to restrain it. Is there anything else you think wrong, that you are not willing to deal with as a wrong? Why are you so careful, so tender of this wrong and no other? You will not let us do a single thing as if it was wrong; there is no place where you will allow it to be even called wrong! We must not call it wrong in the Free States, because it is not there, and we must not call it wrong in Slave States because it is there; we must not call it wrong in politics because that is bringing morality into politics, and we must not call it wrong in the pulpit because that is bringing politics into religion…and there is no single place, according to you, where a wrong thing can be called a wrong thing!”
Speech in New Haven, CT, 1860. Cited in D.A. Carson, “The Intolerance of Tolerance,” p. 105.