Life has taught me to think，but thinking has not taught me to live.

自由的代价是永远保持警惕。

The best time to start building your identity capital is in your 20s.

The past is never dead. It's not even past.

解释：称赞人不夸大他好的地方，那么听的人心里不痛快；诽谤人不增加他的过错，那么听的人心里不满足。

Every improvement in the circumstances of the society tends either directly or indirectly to raise the real rent of land, to increase the real wealth of the landlord, his power of purchasing the labour, or the produce of the labour of other people.

诗歌是灵魂的语言，是无形之物的声音。