I have self-doubt. I have insecurity. I have fear of failure. I have nights when I show up at the arena and I’m like, “My back hurts, my feet hurt, my knees hurt. I don’t have it. I just want to chill.” We all have self-doubt. You don’t deny it, but you also don’t capitulate to it. You embrace it.

你越努力，就越幸运。

幸福不是没有痛苦，而是有能力克服它。

成功的路上没有捷径，只有不断努力。

广泛地学习，详尽地探究，慎重地思考，清楚地辨别，忠实地执行。

这类波可以像光波一样被反射、折射和偏振。