I love Huckleberry

I read both The Adventures of Tom Sawyer and the Adventures of Huckleberry Finn as a middle school aged student. Reading it the was just interesting and the book truly "caught me up in a world" where things were always full of adventure. However, now that I am reading the novel with the eyes of a Senior Literature major who has been specifically trained to notice themes and motifs in works, I cannot help but notice that the theme of love and suffering (and the relationship between the two) are over-arching and emphasized greatly in this novel. Huck is always looking for the kind of love he needs: he receives tough love in the form of the widow forcing him to have manners, and he receives extremely tough "love" from his pap who is cruel to him, and then he meets Jim, a runaway slave who has experienced extreme suffering, and finds the love of a companion that he has always needed. Does love bring suffering, or does suffering bring love, or neither? I think that this theme would be interesting to explore throughout the entire work.