一个人如果不讲信用，不知道他怎么能立身处世？就像牛车没有了輗，马车上没有了軏，还靠什么行走呢？

Causal inference is not just about statistical significance; it's about understanding the mechanisms behind the numbers.

In one of the stars I shall be living。 In one of them I shall be laughing。 And so it will be as if all the stars were laughing， when you look at the sky at night… You – only you – will have stars that can laugh.