Determine the author’s main purpose in the following passage from an analysis of Huckleberry Finn by Keith Neilson, in which he discusses Huckleberry Finn’s dilemma over turning in a runaway slave that he believes to be the legal property of his owners:

Given opportunities to turn Jim in, Huck finds that he cannot; his feelings toward Jim have become too strong. Huck begins to experience emotions that he has never had before – personal concern, loyalty, guilt, and fear. He is soon forced to accept Jim, not as a slave, but as a human being, and once he does that, all the contradictions of his moral situation become evident to the reader, if not immediately to Huck. He is forced to consciously choose between loyalty to his society’s morality and his friend’s freedom. That moment of choice is one of the great moments in American literature.