According to Matthew 19:4-6 marriage is a sacred relationship that one has between a man and a woman. Yet, Jesus teaches us that according to the Mosaic Law all a man had to do was write down on a piece of paper that he wanted a divorce and it was official.  He tells us that this was done because of their hard hearts meaning that men wanted what they wanted not what God wanted.

In 2 Co 11:2 and Ephesians 5:22-33 Paul tells us that marriage is symbolic of the relationship that man has with God.  Paul teaches us that the church is the bride of Christ. Only in the case of adultery where the member of the church falls away from God and goes after other gods such as lust and selfishness does he commit spiritual adultery against Christ and will therefore be liable to separation (divorce) from Him. 

So when we enter into marriage we need to see our marriage in the light of such advice and do all that we can to make it work. I believe that when Paul tells us in Romans 12:18 that as much as lies within us we must live peaceably with all men, we must also submit to the same devotion to do all we can to make a marriage work for a good marriage to our spouse symbolizes our good marriage to Christ.