Theme of Huck Finn

In Huckleberry Finn, there seems to be a recurring theme throughout the novel, and that theme is shown mainly through Huck's character, but also Tom's. That theme is, do what you think is right. There are many instances throughout when Huck is with Jim on the raft. Many times they come across a "problem" that can be solved. One example is the Walter Scott. Two "murderers" have a prisioner on board and have him tied up and are going to kill him. This is all going on during a thunderstorm and they see the wrecked ship and go aboard to see if they can use anything. That's when they come across them. Quickly, Jim and Huck think of a plan to strand the murderers on board so they get killed also. If Huck and Jim wouldn't have kept the murderers on the boat, they would have escaped. But due to their actions, they kept justice in play. They did the right thing by giving them what they had coming.
Another example comes later in the book when Huck decides he wants to become a better person and start following the faith. He writes a letter to Miss Watson and tells her that he has Jim is with Mr. Phelps and will send him if she sends a reward. Huck felt like he had done something good and he felt relieved. Then he started to remember all the time he had spent with Jim and how good of friends they had become. He ripped up the note and said, "Alright then, I'll go to hell." Huck has become such a close friend to Jim that he isn't willing to do the right thing and try to keep him out of slavery. In the end, Widow Douglas dies, and she set him free in her will.
Overall, the theme that I have found throughout this book is what we have learned from Henry David Thoreau: Do what your conscience tells you is right and follow it.