☉ 既有今日，何必当初 【jìyǒujīnrì，hébìdānɡchū】
　　[ if there must be today,then why should there have been other days if I had known it would come to this,Iwould have acted differently if it has to be like this now,it‘s a pity it was even like that in the beginning ] 既然有今日的如此结果，何必在当初那么做。用以感慨现今的不如意，而深悔过去的错误。
　　例： 宝玉在身后面叹道:“既有今日，何必当初。”——《红楼梦》