The law of the conservation of energy is not merely an empirical law; it is a necessity of thought.
能量守恒定律不仅是一条经验法则,更是思维的必然要求。
Quality means doing it right when no one is looking.
In the darkness, even a small light can guide you home.
所有生而为人者都需要教育,因为他们注定要成为真正的人,而非野兽、愚钝的动物或木头。
追求幸福不是要一直感觉良好,而是要朝着有意义的目标努力。