Innovation is not about saying yes to everything. It’s about saying no to all but the most crucial features.
我似乎总是想以最节能的方式，用自然界里最平常的东西来造各种东西。
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.