Anna Karenina - To what extent can a novel you have studied be considered the journey of a character or characters?

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…my thoughts.....is every moment of it no longer meaningless as it was before, but has an unquestionable meaning of goodness with which I have the power to invest it." Levin journeyed from being doubtful, unsure to finding something all men strive for, Peace. The man he was at the start of the novel is a different man from him in the end of the story. He matures and finds harmony with those around him.