在旧的世界里，你用30％的时间创建一种伟大的服务，用70％的时间来营销。在新的世界里，这个比例应该倒过来。
On marketing: "In the old world， you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world， that inverts."
The beauty of mathematics is that it is one of the few areas of human endeavor where absolute truth can be known.
当你尝试新事物时，你永远不知道会发生什么。这一切都是实验性的。
The best way to find yourself is to lose yourself in the service of others.