真相是，我们在这个世界上都是孤独的。
可持续林业不是一种选择；它是一种义务。
法律的目的不是废除或限制自由，而是保护和扩大自由。
I think that the thing that makes mathematics worthwhile is the fact that it has this incredible structure that you can explore and discover.
The pursuit of knowledge is a journey without end, but each step brings its own rewards.
The best way to find yourself is to lose yourself in the service of others.
每本书都是一句引文；每座房子都是从所有森林、矿山和采石场中引用的；每个人都是从他所有祖先中引用的。
永远别让你的道德感阻止你做正确的事。
Man’s main task in life is to give birth to himself, to become what he potentially is. The most important product of his effort is his own personality.