(n, vs)cultivate one's character by studying hard; diligent application
君の実力なら楽勝だとは思うが、それに驕らず、まずはクラスのみんなと切磋琢磨していって欲しい。 With your ability it should be a doddle, but please don't be prideful of that but first apply yourself dilligently with everyone in your class.