We are not born for ourselves.
［译］人生非为己。
What is done by night appears by day.
［译］若要人不知，除非己莫为。
While we converse with what is above us, we do not grow old, but grow young.
［注解］语出美国哲学家Ralph Waldo Emerson（爱默生）。
［译］与高于自己的思想进行交流，人不会变得年老，只会变得年轻。