You can never know anyone as completely as you want.

可持续性不仅仅是一个流行词，它是未来森林必须赖以发展的基础。

社会通常会原谅犯罪，却从不原谅梦想家。

人的仁慈从未削弱自由者的毅力或软化他们。一个国家不必变得残酷就可以坚强。

Hard work, under the old system, meant long hours, little rest, and poor pay. Under the new system, it means a fair day's work for a fair day's pay.

You do not need to leave your room. Remain sitting at your table and listen. Do not even listen, simply wait. Do not even wait, be quite still and solitary. The world will freely offer itself to you to be unmasked, it has no choice, it will roll in ecstasy at your feet.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

数学是科学的钥匙和门。