We don't stop playing because we grow old; we grow old because we stop playing.

The ideal of behaviorism is to eliminate coercion: to apply controls by changing the environment in such a way as to reinforce the kind of behavior that benefits everyone.

Collaboration across borders and cultures is the key to solving global agricultural challenges.

阅读只为心灵提供知识的材料；是思考使我们所读的东西成为我们自己的。

注释：恭敬、节俭、谦逊、守礼，这样才能自我坚守。深谋远虑，这样才能避免困厄。亲近仁德之士、结交正直之人，这样才能在危难时得到帮助。