" Leyel had buried himself within the marriage, helping and serving and loving Deet with all his heart. She was wrong, completely wrong about his coming to Trantor. He hadn't come as a sacrifice, againt his will, solely because she wanted to come. On the contrary: because she wanted so much to come, he also wanted to come, changing even his desires to coincide with hers. She commanded his very heart, because it was impossible for him not to desire anything that would bring her happiness.

But she, no, she could not do that for him. If she went to Terminus, it would be as a noble sacrifice. She wold never let him forget that she hadn't wanted to. To him, their marriage was his very soul. To Deet, their marriage was just a friendship with sex. Her soul belonged as much to these other women as to him. By dividing her loyalties, she fragmented them; none were strong enough to sway her deepest desires. Thus he discovered what he supposed all faithful men eventually discover--that no human relationship is ever anything but tentative. There is no such thing as an unbreakable bond between people. Like the particles in the nucleus of the atom. They are bound by the strongest forces in the universe, and yet they can be shattered, they can break.

Nothing can last. Nothing is, finally, waht it once seemed to be. Deet and he had had a perfect marriage until there came a stress that exposed its imperfection. Anyonewho thinks he has a perfect marriage, a perfect friendship, a perfect trust of any kind, he only believes this becasue the stress that will break it has not yet come. He might die with the illusion of happiness, but all he has proven is that sometimes death comes before betrayal. If you live long enough, betrayal will inevitably come. "

― Orson Scott Card , Maps in a Mirror: The Short Fiction of Orson Scott Card