How can self-discipline and attuitude influence learning?

Self-discipline and attitude are two traits that affect a students learning. Students need to know how to react whether they don't understand something, received a bad grade, or are having a bad day. Acting up will not fix this and it does not help the student or the class. Attitude is a big obstacle for many students as they believe it is impossible to learn something, therefor they prevent themselves from even having a chance at learning it. A self-disciplined student will learn and prevent, rather then misbehave, then complain.