你必须愿意失败才能成功。

A mathematician is a device for turning coffee into theorems.

I would like to fly in space.Absolutely.That would be cool.I used to just do personally risky things， but now I’ve got kids and responsibilities， so I can’t be my own test pilot.That wouldn’t be a good idea.But I definitely want to fly as soon as it’s a sensible thing to do.

A good algorithm is like a well-told story.

You are someone I will never forget.