The attitude that a writer takes towards a subject, the reader, or a character is called the B. tone.
Wallace places emphasis on the word "adjust" because he is addressing our realities and way of thinking as "default." He expresses the importance of paying attention to your surroundings, and adjusting to other perspectives and ways of thinking. He compares our ignored experiences to the water fish swim in but were never taught to notice.
No the narrator probably wouldn’t have killed the old man. when the narrator snuck into the old mans room late at night the old man was always asleep so the narrator couldn’t see his eye which don’t bother the narrator. The narrator even said he loved the old man it was just his “evil eye” bothering him
When Ivan developed an illness, his character developed from being self-centered to being compassionate. By facing his own death, he began to examine his life. Gerasim, the one who helps Ivan during his sickness, was also a factor to his character development.