Many classmates who are in long-lasting marriages said they experienced a turning point, when their early marriage suddenly transformed into a mature relationship. “I’m doing the best I can!” one classmate told me she said to her husband in the middle of a particularly stressful couples’-therapy session. From that moment on, she said, he understood: Her imperfections were not an insult to him, and her actions were not an extension of him. She was her own person, and her imperfections were what made her her. Sometimes people forget this, in the thick of marriage.