大丈夫做事，只问对错，不问利害；只问是否符合道义，不问成败；只考虑万世的影响，不考虑一生的得失

Writing is like driving at night in the fog. You can only see as far as your headlights, but you can make the whole trip that way.

经济模型的价值在于其解释和预测的能力。

Be regular and orderly in your life, so that you may be violent and original in your work.