Genesis 2:24

Therefore a man shall leave his father and mother and be joined to his wife, and they shall become one flesh.

God gave marriage as a gift to Adam and Eve. They were created perfect for each other. Marriage was not just for convenience, nor was it brought about by any culture. It was instituted by God and has three basic aspects: (1) the man leaves his parents and, in a public act, promises himself to his wife; (2) the man and woman are joined together by taking responsibility for each other’s welfare and by loving the mate above all others; (3) the two become one flesh in the intimacy and commitment of sexual union that is reserved for marriage. Strong marriages include all three of these aspects.