我必须研究政治和战争，以便我的儿子们可以自由地研究数学和哲学。

Vanity and pride are different things, though the words are often used synonymously.

It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent.

书籍是代际之间的桥梁。

创新是一个社会过程，而不仅仅是技术过程。

Enduring peace cannot be bought at the cost of other people's freedom.