你应该做一些你热爱并且认为非常重要的事情。
You should be doing something that you're passionate about and that you think is really important.
The past is always present in the work I do.
——辛格1978年诺贝尔文学奖获奖演说
In the end, the value of a theory is not in its complexity, but in its ability to explain and predict.