Marriage is not mainly about prospering economically; it is mainly about displaying the covenant-keeping love between Christ and his church. Knowing Christ is more important than making a living. Treasuring Christ is more important than bearing children. Being united to Christ by faith is a greater source of material success than perfect sex and double-income prosperity.
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.