——出席国民党上海交通部恳亲会,1913年1月10日
Memory is identity... You are what you have done; what you have done is in your memory; what you remember defines who you are.
物理学的美丽在于它能够用简单的原理解释复杂的事物。
In a state, the liberty of one citizen is a menace to the liberty of another.