I can see how marriage has the potential to transform people to be more Christlike, and so, feel closer to God. Marriage is all about separating, coming closer, separating, coming closer in repeat over small things (minor argument about what to eat, silent treatment, etc.) and big things (major lies, etc.) and there is a lot of forgiveness and compromise involved during this process. This back and forth of forgiveness and reconciliation mirrors our own relationship with God.