Surround yourself with people who challenge you, not just agree with you.

唯一的限制是你给自己设定的限制。

对于一个伟大的头脑来说，没有什么事情是小的。

The most successful modern states are those that have been able to harness the power of the market while maintaining a strong state capable of enforcing rules and providing public goods.

出自北齐·颜之推《颜氏家训·文章》。书写文章要尊崇“三易”的原则，即文章内容要清晰明了，这是第一项。书写的文字要简单概要，这是第二项。书写的段落要读起来朗朗上口这是第三项。