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.

在山中行走十里，气候就会突然不同

Core technologies cannot be bought; they must be developed independently.

In things indifferent， nothing is preferable to anything else.

如果人们不能相信他们的政府做它该做的事，保护他们和促进他们的共同福利——那我们就完全失败了。