He only knows that you must be dedicated, sincere, and realistic, whether at school or at work, and learn as much as you can. Then, "when opportunity knocks," you'll be ready.
他只知道，無論是念書、做事都要勤懇、踏實，盡個人最大的努力學習，那麼「當機會敲門時」，你已經準備妥當，便可從容上陣。