无限小的事物在自然中的作用是无限大的。

The test of a psychological idea is its life-enhancing power.

At the end of the day it's not about what you have or even what you've accomplished... it's about who you've lifted up, who you've made better. It's about what you've given back.

解析：意在言外，得意忘言。

（一个人）在本不应结束的点上结束、舍弃了自己的努力，这样的人就什么事都可能结束放弃。对于应该厚待与重视的人，没有厚待重视而是慢（薄）待轻视，那么他对什么人、什么事都可以慢待轻蔑。这样的人，向前进行的时候锐气十足，（遇到难点）倒退下来，也会非常迅速。