贪心不知足易招侮辱，不如节俭而守廉洁之气。求取功名而冒犯节义，不如节俭而成全节义。巧取豪夺而致积怨，不如节俭而养心性。放纵自己满足欲望，不如节俭而安定性情。

"The world is full of obvious things which nobody by any chance ever observes."

At the close of our studies， we knew all the past of physics， but nothing of the present and the future.

The Langlands program is a framework for understanding the unity of mathematics.

每个回声都包含着它所处空间的历史。