What are the motifs in The Idiot by Fyodor Dostoevsky?

Acceptance of the other is a recurring idea in the book. The three main characters are all outsiders who struggle to fit into Russian society throughout the novel. The Prince finds friends, but only because he is such a forgiving and kind person, and others know they can easily take advantage of him. For example, Lebedev helps to write scandalous letters about him and even tries to get him put back into a mental hospital. In fact, most of the other characters view the Prince as an eccentric, rather than one of them. The Yephanchin's, for example, adore his company, but refuse him permission to marry Aglaya.