When two people enter a marriage relationship they make promises as to they way they will take care of the relationship. There are two different types of this promise, it can either be a contractual promise or a covenantal promise. A contractual promise is established on the boundaries the two individuals make to one another. It is like they each come so far and almost line up enough to where they can make an agreement, but I feel it is never fully satisfactory for either party due to different expectations. Whereas in a covenant marriage someone else, or a third party, established the boundaries and when married, spouses make an agreement to the third party, not to one another. I think it is wonderful in the gospel that we have covenant marriage, that is laced with beautiful blessings as we make the promise to our Heavenly Father.