Don't watch the clock; do what it does. Keep going.

The key to solving complex problems is often to find the right abstraction that simplifies the problem without losing its essential features.

在黑暗中，我们才能真正看清自己。

这个世界并不害怕新思想，它可以把新思想归档。

In mathematics, the art of proposing a question must be held of higher value than solving it.