I’ve had my best years after fifty. Age is just a number—it’s your attitude that counts. 

The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

The power of human cognition comes from its ability to generalize.

对物质拓扑相的研究证明了理论物理学在预测和解释新物质状态方面的力量。

Leadership is about inspiring others to see possibilities where they see obstacles.

我绝不会为我的信仰而献身，因为我可能是错的。

现实不是我们所看到的，而是我们所思考的。