有一个你无法解决的问题总是好的。这意味着你有事情要做。
It is always good to have a problem that you cannot solve. It means you have something to work on.
Don't be afraid of failure, because every failure is practice for success.
Children are the most honest critics; they will tell you exactly what they think.
我们必须始终质疑我们的假设,并愿意根据新的证据修订我们的理论。
The map is not the territory.