as a high student, i went throught lots of exams,when i pass the exams,i will feel happy,if i fail the exams,i will feel sad,so i get a regular way.when you don't pass the exam or you think the exam grade is bad,you could feel unhappy and sad
at the first attitude,if you don't face failure,you can lost your confidence,so that you will dislike studying,you could feel tired and you don't want to go ahead hard,it is a bad thing for you
at the second attitude,but when you know you fali the exams,you find your mistakes,you can encourage yourself,you can improve your grades and your confidence,you will don't make the same mistakes at last,so you need face you failure and keep a good feelings,i think you can get succeed,
so in my opinon ,as the old saying goes by,the failure is succed' mother.