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.
要找到自己，就要为自己思考。
几个世纪以来纸张一直是人类知识的载体，我们的责任是确保它再延续几个世纪。#