To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.
古往今来的平庸之人，都是因为懒惰而失败；古往今来的有才之人，都是因为骄傲而失败。
Man, unlike any other thing organic or inorganic in the universe, grows beyond his work, walks up the stairs of his concepts, emerges ahead of his accomplishments.
当课堂只追求“有趣”，知识就失去了厚度。
We are going to die, and that makes us the lucky ones.
The future of energy lies in diversification—no single source will meet all our needs.