The past is never dead. It's not even past.
这是最幸运的年代,也是最倒霉的年代,这是智慧的年代,也是愚昧的年代;这个时期信仰与怀疑共存,这个时期光明与黑暗共存;这是希望之春,也是失望之冬;人们面前琳琅满目,但又一无所有;我们正直达天堂,我们正直通地狱。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.