While there is no doubt marriage is a sacred rite in the religious sense, the future of this nation and 225 years of tradition depend upon that written contract between the government and the people. The aggregate impact of all marriages can move society in one direction or the other, but a change in the Constitution can immediately do so - and to a tremendous ectent.
Indeed, I would argue that, with every instance of government overreaching its bounds, the institution of marriage is damaged. Failure to heed the Constitution itself damages personal responsibility and undermines marriage.
In a sign of solidarity for my Florida friends, I vote for the Constitution a second time. ;-)