I had read Judy Blume books before but I would probably go with the first one I hoped I helped
Answer and Explanation:
The poem addresses the tragedy of a man who seeks an impossible dream. In this case, we can consider that the hoprizon that he pursues is an allegory for this dream, because the more the man walks, the more he tries he cannot reach the horizon that always goes further, that is, he never managed to achieve the dream you so desire.
The people around this man will say that his effort is useless, since reaching the horizon and the dream is impossible, but he desires it so strongly that he will continue to try and ignore everyone around him.
In order for me to answer your questions I would need to know Whom you are talking of, what they were carrying and why they were doing it so that I could help you understand as to why it would help them to carry these before mentioned things. <span />