That is why a man leaves his father and mother and is united with his wife and they become one. Genesis 2:24
In the story of creation, God created all the things in it and human being was last of his creation. He created one man Adam to be liked them and resemble them.
Adam was placed in the Garden of Eden. He longed for a companion as his partner so God took one rib out of the man’s ribs and clothed up the flesh. At last Adam had one of his own kind and the two were united and they became one body. This proved that in the plan of God, husband and wife are joined, and they are one body.
The Holy Trinity; God the Father, God the Son and God the Holy Spirit . They are mysteriously linking with one another, three persons, one body.
Paul in his letter to the Ephesians said every husband must love his wife as himself. It was also said that husbands, love your wives just as Christ loved the church and gave his life for it. Wives submit and respect your husbands too to show reverence for Christ. So that the Spirit of love, two persons as one would manifest the mystery of the Holy Trinity.
The path that leads to happiness is so narrow that two can not walk on it, unless they become one.