Christian marriage came from Judaism - - Adam and Eve. The Bible says so...
Marriage was long established in Judaism before Rome ever existed. Rome is not the center of Christianity - - Yeshua was born into the House of David.
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Christ refers to the natural institution in its ideal form.
No, he was referring to Genesis 1:18, Yahweh and Yeshua are one in the same...
Genesis 1:18, as Man is created male and female, prior to any covenant, prior to any distinction between Jew and Gentile, as I said, the natural institution, not its Jewish religious instantiation of that natural institution.
I repeat, Christianity did not carry over the Jewish marriage rite, but adopted Roman civil marriage. I am not theologizing about marriage, nor interpreting Scripture, I am reporting historical fact.
I have often thought that as applied to Church history, the sequent to "those who cannot remember history are condemned" is not "to repeat it", but "to make it up."