数学不是关于数字、方程、计算或算法的：它是关于理解的。

On pivoting: "If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve."

The key to successful investing is to have a clear understanding of the risks and rewards, a disciplined approach, a long-term perspective, and a strong understanding of the fundamentals.

The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.