有时最艰难的战斗发生在我们内心的沉默中。

The great advantage of old age is that you can be as rude as you like.

学者学习古人，开始时接触到的是粗浅的内容，中期接触到精华，最终领悟到其神妙变化。

The AdS/CFT correspondence is a profound insight into the nature of reality, bridging the gap between quantum mechanics and general relativity.

Love is the only way to grasp another human being in the innermost core of his personality.