Jeanne

“But gay marriage is coming to America first and foremost because marriage here is a secular concern, not a religious one. The objection to gay marriage is almost invariably biblical, but nobody's legal vows in this country are defined by interpretation of biblical verse - or at least, not since the Supreme Court stood up for Richard and Mildred Loving. A church wedding ceremony is a nice thing, but it is neither required for legal marriage in America nor does it constitute legal marriage in America. What constitutes legal marriage in this country is that critical piece of paper that you and your betrothed must sign and then register with the state. The morality of your marriage may indeed rest between you and God, but it's that civic and secular paperwork which makes your vows official here on earth. Ultimately, then, it is the business of America's courts, not America's churches, to decide the rules of matrimonial law, and it is in those courts that the same-sex marriage debate will finally be settled.”
― Elizabeth Gilbert, Committed: A Skeptic Makes Peace with Marriage