The past is a foreign country; they do things differently there.
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
如果一个人只希望幸福,这很容易实现;但我们希望比别人更幸福,这总是困难的,因为我们相信别人比他们实际更幸福。