It's nice to help others.
Bruce notices that one of his classmates is having a difficult time understanding a concept that has been under discussion for several weeks.
Bruce needs to decide whether or not to offer support to his classmate.
Bruce talks with his classmate and offers to work with him for a couple of hours per week, as a small study group.
Bruce decides that this is none of his business and leaves his classmate alone to struggle with the material.
His classmate is appreciative of his help and passes the course.
Bruce feels guilty when, at the end of the semester, his classmate fails the course.