Retire into yourself and ask yourself this question: Must I write？ If the answer is yes， then you must keep writing.

质量不是一种行为，而是一种习惯。

"To read is to travel without moving, to live a thousand lives in one."

纠缠不仅仅是量子理论的一个奇特特征，它是量子力学的标志性特征。