To live is to be constantly learning.

写作是一种自由的行为，但也是一种责任。

The function of mental processes is to mediate between the needs of the organism and the demands of the environment.

唯一真实的旅程是内心的旅程。

如果技术不能解决实际问题，它就毫无意义。

永远不要低估坚持的力量。

森林的真正价值不能仅用板英尺来衡量。