The outward appearance is identical, but the foundations are different. Sand won’t support the building, but rock will. The question that Jesus poses to us in the teaching is where is our foundation.
Sermon on the Mount
The Conference affirms as our Lord’s principle and standard of marriage a life-long and indissoluble union, for better or worse, of one man with one woman, to the exclusion of all others on either side, and calls on all Christian people to maintain and bear witness to this standard.
Resolution 67, 1920 Lambeth Conference,