Marriage is a union of two, in which each one undertakes to care for the other, and the second agrees to obey the first. If this is to be a godly union, the two must come together in accordance with God's will and order, not through their own action and choice. That means that neither shall forsake the other, but together they shall endure good and bad times as long as they live.
Marriage consists of three stages or levels.
Third is the unity between one man and one woman. Because marriage between man and woman is something that can be seen and grasped by everyone, it is an image, an outward sign of something invisible which is to become reality in the visible world. It is a sign pointing to the middle and highest grades of marriage. It points first to the fellowship of justice and brotherliness, the fellowship between God's Spirit and man's spirit. It points to the middle grade where everything in which we believe becomes visible.