嫦娥
唐·李商隐
云母屏风烛影深，
长河渐落晓星沉。
嫦娥应悔偷灵药，
碧海青天夜夜心。

The poem describes that Chang'e should regret eating the elixir of immortality, because she paid the price, now she can only taste loneliness alone in the blue sea and blue sky. In the story of Chang'e, she is a person who pursues long life and gets what she wants. But there is always loss behind her. She worked hard for her long life at the beginning, but now she mourns for the loss of freedom. What you can't do is to have the best of both worlds.