Mastery is not a function of genius or talent. It is a function of time and intense focus applied to a particular field of knowledge.
The essence of mathematics lies in its freedom.
The best way to predict the future is to create it.
【大意】干枯的竹子能生火,但不去钻它就不会燃烧;地下藏有泉源,但不去挖掘就流不出泉水来。