13. what does huck mean when he says of jim, "i knowed he was white inside. ."?

 The first thing you have to understand about Mark Twain is that he was an Abolitionist, not a racist. What he wrote regarding the relationship between Huck and Jim takes on a whole different meaning if you understand that. 
Huck is saying that, by being a person of courage, honesty, honor, loyalty and integrity, despite his status as a runaway slave, Jim had the soul of a white man. This appears to those unfamiliar with Twain as a racist remark, but it is far from it. 
Huck himself, a white child of no education, was the son of a man exactly the opposite of Jim. He had always been taught that black men were inferior, and this statement is the first hint of him beginning to recognize that it isn't true.

Oh sheet. i dont really know.oof, just relax with some memes mate.