What are the motifs in The Beast in the Jungle by Henry James?

Self and other is a recurring idea. As numerous critics point out, Marcher's guilty feelings and worries about his potential selfishness in regard to May Bartram, or about his egotistic self-involvement in the circumstances of his own fate, are telling. What he comes to believe, finally, is that it is precisely this self-involvement which robbed him of a full life. Marcher, then, fundamentally misunderstands his relationship to those around him. He learns that he cheated himself of contentment by isolating the significance of his own life and his own self from the lives and selves of all others.