平生不做亏心事，半夜敲门心不惊

píng shēng bù zuò kuī xīn shì , bàn yè qiāo mén xīn bù jīngpingshengbuzuokuixinshi,banyeqiaomenxinbujing

1. He who never wrongs others does not fear the knock in the night.
2. Rest with a clear conscience.

Study it in Yanamino