当市场下跌时，你轻易的将好东西打折变卖，但是一旦市场向上，再想买回来，难之又难。
Failure is the best teacher. You learn by making mistakes and figuring out how to correct them.
On motivation: "I strongly believe that missionaries make better products. They care more. For a missionary， it's not just about the business. There has to be a business， and the business has to make sense， but that's not why you do it. You do it because you have something meaningful that motivates you."
Understanding the computational complexity of learning problems is essential for developing efficient algorithms.
To feed the world, we must first learn to listen to the earth.
I don't run from my past, I just don't bring it with me.
任何东西的初稿都是狗屎。
To turn caring into action, we need to see a problem, see a solution, and see the impact. But complexity blocks all three steps.