写作是一种勇气之举——你必须愿意暴露自己最深层的想法。

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.

The difference between animals and humans is that humans are capable of reasoning， but even that is unreliable.

It takes considerable knowledge just to realize the extent of your own ignorance.

科学的历史是人类纠正错误的历史。