释义：美丽的彩云容易消散，明亮的圆月难得圆满。

The best way to forget something is to replace it with something better.

The beauty of formal methods lies in their ability to provide absolute certainty about the correctness of a system.

清明彪炳的节义，是在独居之时修身励志、培养出来的；旋转乾坤的治国韬略，是在临深履薄的谨慎戒惧中造就而成的。