Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.

可持续增长需要在技术和人才两方面都进行投资。

一个理论最重要的在于其预测的有效性，而非其美学吸引力。