曾经沧海难为水早死晚死都得死
[céng jīng cāng hăi nán wéi shuĭ zăo sĭ wăn sĭ dōu dé sĭ]
Having seen the great ocean, no other water can match it. Early death or late death, one will die eventually. These words combine two sayings to express feelings of disappointment and pessimism after having experienced something incomparable, as well as a helpless view on the finality of death.