《旧唐书·列传·卷十六》
从这些话看来，进里头就包含着退的意义，存里头就包含着亡的原由，得里头就包含着失的道理，我为陛下珍惜美德的原因，正在于此。
由此言之，进有退之义，存有亡之机，得有丧之理，老臣所以为陛下惜之者，盖此谓也。
From these words, we can find that advancing includes the meaning of retreating, existing includes the reason for dying, gaining includes the principle of losing. This is the reason why I cherish Your Majesty's virtues.