最终，我们记住的不是敌人的话语，而是朋友的沉默。

The world is a place of the living, and the dead have no place in it. The dead are nothing. They are not even a memory. They are forgotten. And the living, too, will be forgotten.

人与人之间都是相互的。爱别人的人，别人一定也爱他；为别人谋求利益的人，别人也一定为其谋求利益；憎恨别人的人，别人一定也憎恨他；残害别人的人，别人也会残害他。

农业的未来在于平衡生产力与环境管理的可持续实践。

The greatest happiness is to know the source of unhappiness.

The strength of a response tendency depends on the amount of reinforcement received.