Every individual has a place to fill in the world and is important in some respect whether he chooses to be so or not.
The most important skill for an empirical researcher is not math, but judgment.
解释:人有知识,犹如树木有枝叶,树木有了枝叶,能带给人阴凉,人有了知识,就可以为人民做更多的事。