货币政策中的勇气不是没有恐惧，而是判断有比恐惧更重要的事情。
Courage in monetary policy is not the absence of fear but the judgment that something else is more important than fear.
Happiness is secured through virtue; it is a good attained by man's own will.
You have to spend some energy and effort to see the beauty of math.
The method of psychology must be objective, even when studying subjective phenomena.
One way of looking at speech is to say that it is a constant stratagem to cover nakedness.