What can you infer from the two chants as the forces mankind has to contend with in life?

Danny went for a long bike ride he covered at least forty miles

What is one possible theme for the poem forgetfulness

London includes a quote about john thornton as he is observing hal attempt to motivate the exhausted dogs "it was idle, he knew, to get between a fool and his folly". if the word "idle" is defined as "of no real worth, importance, or significance", what does this statement mean with regard to hal? who is the fool? what is hal's folly? why would john thornton think it of no real worth or useless to intervene?