小洞不堵,大洞難補 [ㄒㄧㄠˇ ㄉㄨㄥˋ ㄅㄨˋ ㄉㄨˇ , ㄉㄚˋ ㄉㄨㄥˋ ㄋㄢˊ ㄅㄨˇ; xiao3 dong4 bu4 du3 , da4 dong4 nan2 bu3] If you don't plug the small hole, the big hole will be hard to repair (idiom); A stitch in time saves nine. ◄ ►