最美的是遗言最丑的是誓言
[zuì mĕi de shì yí yán zuì chŏu de shì shì yán]
Reflects skepticism and criticism of vows, indicating that last words may contain sincere, truthful, profound reflections at life's end—thus considered most beautiful—while vows are viewed as false, pretentious promises often made to manipulate or deceive others into believing them — thus considered the ugliest.