Describe symbolism in Black Dogs by Ian McEwan

In Part IV, the couple's return walk after the dog incident is symbolic of their parting ways. Although they tread the same ground, it seems as if they are on different paths. June has found spirituality, and is overcome with its import. She cannot communicate her feelings to Bernard, assuming he would not understand. Bernard meanwhile succumbs to sorrow and grief as he surveys the human wreckage left by the war. Without spiritual feeling, he gives in to despair. One wonders if June's enlightenment might have helped Bernard through that difficult day. Had June told him about her spiritual experience, he might even have been receptive. She went on the assumption that a communist skeptic like Bernard would never believe her, conveniently forgetting that she herself had been a communist skeptic up until that moment on the path with the dogs