卒：同“猝”，指突然事变。这两句大意是：心中没有预先考虑应对事变的方法，就不能应付突然变故。

It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.

In things indifferent， nothing is preferable to anything else.

The best biographies are those that make the reader feel they have met the subject in person.

历史上的重大战争——我们在我们这个时代已经看到了这一点——是国家不平等发展的直接或间接结果。