" Marriage by its very nature has the “power of truth”—the power to show you the truth about who you are. People are appalled when they get sharp, far-reaching criticisms from their spouses. They immediately begin to think they married the wrong person. But you must realize that it isn’t ultimately your spouse who is exposing the sinfulness of your heart—it’s marriage itself. Marriage does not so much bring you into confrontation with your spouse as confront you with yourself. Marriage shows you a realistic, unflattering picture of who you are and then takes you by the scruff of the neck and forces you to pay attention to it. "

― Timothy J. Keller , The Meaning of Marriage: Facing the Complexities of Commitment with the Wisdom of God