"The beauty of the covenant-keeping love between Christ and his church shines brightest when nothing but Christ can sustain it."

If we make secondary things primary, they cease to be secondary and become idolatrous. They have their place. But they are not first, and they are not guaranteed. . . . So it is with marriage. It is a momentary gift. It may last a lifetime, or it may be snatched away on the honeymoon. Either way, it is short. It may have many bright days, or it may be covered with clouds. If we make secondary things primary, we will be embittered at the sorrows we must face. But if we set our face to make of marriage mainly what God designed it to be, no sorrows and no calamities can stand in our way. Every one of them will be, not an obstacle to success, but a way to succeed. The beauty of the covenant-keeping love between Christ and his church shines brightest when nothing but Christ can sustain it.

- John Piper, The Momentary Marriage