All three of these qualities are demonstrated during the incident when Huck gets separated Jim and is lost on the river. Jim is worried sick about Huck; when Huck finally finds his way back to the raft, he tells Jim a lie to make it seem like he is never lost at all. Jim, however, does not believe Huck, and says, "En all you wuz thinking 'bout was how you could make a fool uv old Jim wid a lie.", (86). This single quote shows that Jim is both intelligent and perceptive enough to know when Huck is telling a lie. Jim is very worried about Huck, and is extremely hurt by the fact that Huck is lying to him. He is hurt enough by Huck's lie that he is willing to call him on his poor behavior. In addition to reprimanding Huck, Jim teaches him a moral lesson about telling lies. By saying "Dat truck dah is trash"",(86) Jim is essentially calling Huck "trash" for lying to him. This is significant because Jim, a black slave, is teaching Huck, a white boy, an important moral lesson. Through these two quotes Jim is shown as a person with feelings who cares very deeply for Huck. Thus, after this point in the story, it is understood that Jim is caring, intelligent, and perceptive.
Further in the novel, one knows Jim is a paternal figure to Huck. This is exemplified at the point in the story when Huck awakens to find Jim moaning to himself in the early hours of the day. Jim takes Huck's night watch so that the boy can sleep. Huck himself says that "He often done that.", (155) and it shows how Jim thinks of Huck before himself. Sleep is something essential to a person's well being, and by letting Huck sleep through the night, Jim is thinking of Huck's health before his own By looking out for Huck in this way, Jim is acting in a paternal way; the same way that any good father would.
Toward the end of the novel, one knows that Jim is also a deeply caring individual. After Huck awakens to find Jim moaning to himself on the raft, Jim tells Huck of a time when he was with his young daughter, Elizabeth.