The only way to learn mathematics is to do mathematics.

The United States has foolishly given Pakistan more than 33 billion dollars in aid over the last 15 years, and they have given us nothing but lies & deceit, thinking of our leaders as fools. They give safe haven to the terrorists we hunt in Afghanistan, with little help. No more!

经济学不仅仅是预测行为，更是塑造行为。

译文：人生得一知己必须要对知己问心无愧，读书人多读书，一定要学以致用。赏析：做人做事凭着良心方能服众，才不会招致怨愤和祸患。读书的目的就是学以致用，我们不能读死书，死读书，我们要让书中的知识来指导我们的生活。

不期望完全效法古代，不墨守一成不变的旧规，研究当代的实际情况，从而采取相应的措施。