That was then (contraception), this is now (same-sex marriage) ...

"[T]he practice [contraception], undertaken in the interests of 'responsible parenthood,' has received official sanction by many religious groups within the community.  It is difficult to see how the state can forbid, as contrary to public morality, a practice that numerous religious leaders approve as morally right.  The stand taken by these religious groups may be lamentable from the Catholic moral point of view.  But it is decisive from the point of view of law and jurisprudence . . ."   —John Courtney Murray, SJ, “Memo to Cardinal Cushing on Contraception Legislation” (n.d., mid-1960s), http://woodstock.georgetown.edu/library/murray/1965f.htm.