自然实验是理解现实世界中因果关系的强大工具。
Natural experiments are a powerful tool for understanding causal relationships in the real world.
地球并非刚体，其对力的响应必须被视为弹性体。
一言一行，效法古代圣贤，就会道德长进；功名利禄，听任天命安排，就会心意闲适；因果报应，考虑子孙福祸，就会办事公正；口体之事，考虑疾病袭来，就会俭朴节省。
Being different means you have something special to offer the world.
Art is the only revolutionary force.