Don't wait until everything is just right. It will never be perfect. There will always be challenges, obstacles and less than perfect conditions. So what. Get started now. With each step you take, you will grow stronger and stronger, more and more skilled, more and more self-confident and more and more successful.

最终，我们都只是故事，我们能期望的最好结果就是成为一个好故事。

The study of mind is the study of adaptive behavior.

数学的美在于它让我们看到世界上不立即显现的模式和结构。