The best way to cheer yourself up is to try to cheer somebody else up.

学习算法的研究必须同时考虑学习的统计和计算方面。

检验一个经济学家是否优秀的标准，是看他能否比别人更好地解释过去。

做好了官，有余力就要学习，学习好了，有余力就去做官。

When you have nobody you can make a cup of tea for, when nobody needs you, that's when I think life is over.

每个人的生命都有一个决定性的时刻，一个一切都改变的时刻。