A prophet is not without honor except in his own country and in his own house

I'm interested in the weak materials, the materials that people don't think can be used for permanent structures.

Always be prepared. The more you know, the less you carry.

数学教会我们逻辑思考并系统地处理问题。

幸福不是现成品，它来自你自己的行动。

Laws, in their most general signification, are the necessary relations arising from the nature of things.

The greatest thing about tomorrow is, I will be better than I am today.

Get rich or die tryin'.