'By formally declaring anyone opposed to same-sex marriage an enemy of human decency, the majority arms well every challenger to a state law restricting marriage to its traditional definition. Henceforth those challengers will lead with this Court’s declaration that there is “no legitimate purpose” served by such a law, and will claim that the traditional definition has “the purpose and effect to disparage and to injure” the “personhood and dignity” of same-sex couples, see ante, at 25, 26. The majority’s limiting assurance will be meaningless in the face of language like that, as the majority well knows. That is why the language is there.'
— from Justice Scalia's dissent in U.S. v. Windsor