Endurance: The ability or strength to continue or last, esp. despite fatigue, stress, or other adverse conditions;

Junior attacks life with humor and discover a strength inside of himself that he ever knew existed before. Even though he has water in his Bain he is still very smart. He also has anger problems because he has the same books that his mother had when they went to school. And the fact is that he is not really learning anything if the book is from the past.