身份不是固定的；它是流动的，不断演变的。

Sustainability in agriculture is not an option—it's a necessity for the future of our planet.

The elements of consciousness are to be studied in isolation.

I believe in the power of storytelling to change the world.

The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of all the rich men in the country.

局外人

没有道德的效率只是短期的成功。