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.

The question is not how to get cured, but how to live.

教育体系是以感官基础,以思考为过程,以自由为目的。

The only limits in life are the ones you set for yourself.

自守形式的研究证明了对称性在数学中的力量。