What if marriage isn’t just a label? What if it really exists, as much a part of the created order as is gravity or energy? Then we couldn’t flout it without consequences, any more than we could step off the roof and choose not to hit the ground.
Indeed. He is absolutely correct. Marriage is indeed part of the divinely created order and fundamental to human existence. While especially significant to Christans because of its symbolism of the relationship between Christ and His church (Eph 5:31-32), marriage is also part of the common grace of God to all (i.e., the renewing rain falls on the just and unjust.) Marriage is a blessing mandated by the Creator for this age (Gen 2:24). We can redefine marriage no more than we can stop the rotation of Earth on its axis or its orbit around the sun. To redefine or scorn marriage is as dangerous as staring at the sun with unprotected eyes. Both incur disasterous consequences.