"If this bill passes, it is my deliberate opinion that it is virtually a dissolution of the Union; that it will free the States from their moral obligation; and, as it will be the right of all, so it will be the duty of some, definitely to prepare for a separation,—amicably if they can, violently if they must."
January 1, 1970
https://en.wikiquote.org/wiki/Josiah_Quincy_III