I can't find a friend who is totally devoted to me, and I have to be able to overcome the inertia of my friend by the force of it.
我既找不到一个完全献身于我的朋友,我就必须有些能以其推动力克服我的惰性的朋友。
The art of doing mathematics consists in finding that special case which contains all the germs of generality.