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.

数学的美在于它的简洁性和普遍性。

你不能只是坐在那里等待别人给你那个黄金梦想，你必须走出去，自己去实现它。