Michael D. O'brien said this quote

When his wife died, for a while it was the end of the world, because part of him had died with her. As the long, slow recovery proceeded, he had gratefully and guiltily accepted the return of equilibrium. But he had not paid attention to a parallel phenomenon: his reversion to what he had been before his marriage. Though changed by whatever he had learned during their years together, and by whatever healing had taken place, he had fallen back into the old patterns of withdrawal. Nursing the dreadful wound of her absence, he had failed to notice the subtler void opening up within himself.