Ponyboy repeatedly states that he "doesn't use his head". what does this mean and what are some examples of him not using his head? outsiders

What is a synonym for the word anguish based on the context in which the word appears in this line from james joyce's "araby"? gazing up into the darkness i saw myself as a creature driven and derided by vanity; and my eyes burned with anguish and anger. a. distrust b. torment c. sarcasm d. isolation e. ferocity