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 purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

可持续性不是一种趋势；而是我们对后代的责任。

有时候最勇敢的事就是在一切似乎都失去时继续前进。