唯一存在的限制是你给自己设定的限制。

国君若真的希望人民多而不希望人民减少的话,如果要蓄养姬妾,就不能不节制。

预测未来的最好方式就是创造未来。

The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to go to war with one another.

The principle goal of education is to create men who are capable of doing new things, not simply repeating what other generations have done.

数学家是把咖啡转化为定理的装置。