It is so hard to believe because it is so hard to obey.
因为服从是如此困难，所以相信也是如此困难。
Our industry must be part of the solution, not seen as part of the problem.
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.
The human race has one really effective weapon, and that is laughter.
物理学中的每一个发现都打开了一个新的问题领域，提醒我们追求知识是一个无尽的旅程。