自由不是没有主人，而是选择自己的主人。

真正的可持续性意味着满足当今需求而不损害未来的可能性。

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.

Every setback is a setup for a comeback.