While living on Jackson's Island and thinking that is all by himself, he meets Jim who was Miss Watson's slave and soon realize that he ran off. Here Huck faced with his first tough decision, to go with Jim and help him, or just tell and get a reward. Then Huck joins Jim and promise not to tell and get him to free land, but he still feels guilty for helping a runaway slave, because society has teach him something else.
During this stage of Huck life, he fights with himself of whether he should turn Jim to the authorities or not. Still not sure what to do about the whole situation Huck feels bad because he says Miss Watson never did anything to him that she deserved her slave being taken away. Conscience says to me, "What had poor Miss Watson done to you, that you could see her nigger go off right under your eyes and never say one single word? What did that poor old woman do to you, that you could treat her so mean. I got to feeling so mean and so miserable I most wished I was dead (100). Huck made the decision of turning Jim, but as the story goes on we see how Huck's attitude change toward Jim and how he saves Jim from two slave catchers by tricking them to think that Jim is Huck's father and that he had Smallpox.
Huck seriousness later change as the book progresses. He now realizes that Jim is more human than he was led to believe. An example of this is when he tricks Jim into believing he was dreaming about the fog. When Jim says "en trash is what people is dat puts dirt on de head er dey fren's makes em ashamed (98) This makes Huck feel bad enough to apologize and he finally realizes that tricking Jim was wrong and that he has feelings.
Later when Huck encounters the Grangerfords and the Shepardson, he becomes aware of the hypocrisy of the family's feud with each other. When attending to church with them, he is amazed that while the preacher preaches about brotherly love, both the Grangerfords and the Shepardson were carrying guns.