All things excellent are as difficult as they are rare.
所有卓越的事物都与它们的稀有性一样困难。
I went to the woods because I wished to live deliberately. I wanted to live deep and suck out all the marrow of life, to put to rout all that was not life.
盖亚假说是为那些喜欢散步或只是站着凝视的人准备的,他们思考地球及其承载的生命,并推测人类活动的后果。