既来之，则安之
[since we are here,we may as well stay and make the best of it;now that we have come,let us stay and take the rough with the smooth;now you are here,you'd better stay;since this is so,it's better to accept it and enjoy it] 既已来此,那就随安于此
他果然既来之,则安之,我也只得因居之安,则资之深。——《儿女英雄传》
《论语·季氏》：“夫如是，故远人不服，则修文德以来之。既来之，则安之。”本指招徕远人，并加以安抚。后指已经来了，就应该安下心来。 元 吴昌龄 《张天师》第一折：“既来之，则安之。仙子请坐，容小生递一杯酒咱。”《醒世恒言·卖油郎独占花魁》：“ 瑶琴 既来之，则安之。” 沙汀 《代理县长》：“好好养你的病吧－－既来之，则安之。”