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Marriage did not evolve in the late Bronze Age as a way to determine property rights. At the climax of the Genesis account of creation we see God bringing a woman and a man together to unite them in marriage. The Bible begins with a wedding (of Adam and Eve) and ends in the book of Revelation with a wedding (of Christ and the church). Marriage is God’s idea. It is certainly also a human institution, and it reflects the character of the particular human culture in which it is embedded. But the concept and roots of human marriage are in God’s own action, and therefore what the Bible says about God’s design for marriage is crucial.

If God invented marriage, then those who enter it should make every effort to understand and submit to his purposes for it. We do this in many other aspects of our lives. Think of buying a car: If you purchase a vehicle, a machine well beyond your own ability to create, you will certainly take up the owner’s manual and abide by what the designer says the car needs by way of treatment and maintenance. To ignore it would be to court disaster.

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— Tim Keller (from The Meaning of Marriage)