真相很少是纯粹的，也从不简单。
The truth is rarely pure and never simple.
最难原谅的人永远是自己。
The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart.
解释：大多数花类药材都有升散的作用，而旋覆花却有降气的作用，说明药材特性的多样性。