无论你多么了解一个人做了什么,他做这件事时他认为自己在做什么,以及他现在对他所做的事情有何看法,都不可能确定他下一步会做什么。
(No matter how well you know what a person has done and what he thought he was doing when he did it and what he now thinks of what he did, it is impossible to be certain of what he will do next.)