自信来自于准备充分并精通自己的领域。

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

问题不是如何被治愈，而是如何生活。

译文：亲近贤臣，疏远小人，这是西汉兴盛的原因;亲近小人，疏远贤臣，这是东汉衰败的原因。

The sociological imagination enables its possessor to understand the larger historical scene in terms of its meaning for the inner life and the external career of a variety of individuals.

挑战在于让观众忘记他们正在观看一场表演。