What is he thrusts his fists against the posts?

The phrase "thrusts his fists against the posts" is a line from T.S. Eliot's poem "The Love Song of J. Alfred Prufrock." In the poem, it refers to the anxiety and frustration felt by the speaker, Prufrock, as he struggles with the challenges of daily life and the fear of inadequacy. The image of fists hitting against posts suggests a sense of anger and helplessness, as though Prufrock is trying to fight against an insurmountable barrier or obstacle. This is a powerful metaphor for the emotions that many people experience when faced with difficult situations, and it is a reminder that sometimes, despite our best efforts, we are unable to overcome the challenges that life throws our way.