We come into marriage with our own set of expectations and often our spouse has very different ones. As a result, we both find that our expectations are not fully met and this can lead to conflict in marriage.
1 John 5:14 - Be confident that, if we ask according to His will, He hears us. Christians should do this for all our problems, but specifically for our marriage problems. If we have proper faith in God's power, then we will pray diligently about our marriage problems, and trust that God will answer.