I have self-doubt. I have insecurity. I have nights when I show up at the arena and I’m like, ‘My back hurts, my feet hurt, my knees hurt. But, 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.

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

自信源于内心，没有人能给你。

The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.

Truth is the foundation of all great art.

When you change the way you look at things, the things you look at change.

I am following Nature without being able to grasp her...