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

孔子说：“君子有三件事要警戒：年轻时，血气还不成熟，要戒女色；年壮时，血气正旺盛，要戒争斗；年老时，血气已衰落，要戒贪婪。”

We must balance energy development with environmental protection to achieve sustainable growth.

It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure to the world.

未来属于那些敢于冒险和与众不同思考的人。

自然系统的当前状态显然是前一时刻的结果，如果我们设想一个在给定瞬间理解这个宇宙所有实体关系的智慧，它就能陈述所有这些实体在过去或未来的任何时间的各自位置、运动和一般效应。