如果生活不有趣，那将是悲剧的。

过去从未死去。它甚至还未过去。

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.

你越深入数学，就越能意识到一切是如何相互关联的。