既有今日,何必当初
Contents
Existing today, why did
  Explanation: Now sorry, why would anyone do that?
  Source: Puji Song Interpretation "Zen Master Wu Deng Hui Yuan Fasi Wai Wai Lin tink the Zen Master," said 'the lower flow, how to understand? 'The master said' V dead miles. 'Said,' If I had known the pain of not regret inadvertently did. '"
  Examples: Gem of the body behind the Qing Cao sighed :"~?"( "Dream of Red Mansions," the twenty-eighth back)
No. 2
  发音 jì yǒu jīn rì,hé bì dāng chū
  释义 既然现在后悔,当初为什么要那样做?
  出处 《五灯会元·天衣怀禅师法嗣·惠林宗本禅师》:“曰:‘中下之流,如何领会?’师曰:‘伏尸万里。’曰:‘早知今日事,悔不慎当初。’”
  示例 宝玉在身后面叹道:“~?”(清·曹雪芹《红楼梦》第二十八回)
  类似成语
  不咎既往 既成事实 既来之,则安之 既往不咎 既有今日,何必当初
  一如既往 一言既出,驷马难追