解释：向外物游览就要要求外物的完备，向自己内心求取，则能充实完善自身。
We are all prisoners of our own memories.
数学的快乐来自创造的行为，而不仅仅是结果。
It is not death that a man should fear, but he should fear never beginning to live.
我喜欢快乐，我喜欢玩得开心。我喜欢大笑。我热爱生活。
The best music is essentially there to provide you something to face the world with.
The city is a great artifact, the supreme work of human civilization.
