物理理论的美不仅在于其数学的优雅，还在于其解释和预测现象的能力。
In matters of style, swim with the current; in matters of principle, stand like a rock.
Music is the universal language of mankind.
Nothing spoils a romance so much as sense of humour in the woman—or the want of it in the man.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.