One example of this is when Huck has to decide whether to turn Jim in to the slave hunters or not. He rebels against the restraints of civilization-artificial, middle-class society-- and its delusions, represented by cramped clothing and religion.
Huck's complete sincerity, which leads to his dislike for hypocritical civilization, is his defining quality.
Huck is a very caring person and through out his journey he had the need to help those around him.
For instance, he starts writing Miss Watson a letter, telling her where her slave, Jim, is.
When Huck's adventures grow to involve more people and new moral questions never before raised, it is clear that he has started to change.
By the time the book is almost over, we can see a radical change in Huck's opinions, thoughts, and his views of "right and wrong".
Huck’s attacks on prayer and his concepts of heaven in chapters i-iii introduce the motif (Blair, 134).
When he was told about heaven and hell (he refers "good" and "bad" place respectively), he thinks about going to the "bad" place because he finds dull singing and praying to god, while the bad place appeals to him as he hears that his friend Tom Sawyer is going to the bad place (37).
He now realizes that Jim is more human than he was supposed to believe. He continuous lying and playing jokes, but now he feels some guilt whenever he does this.
For instance when he tricks Jim into believing he was dreaming about the fog.