ㄉㄠˋdàoㄍㄠgāoˇchǐㄇㄛˊㄍㄠgāoㄓㄤˋzhàng

  1. 佛家告誡修行謹防外界誘惑正氣邪氣容易正氣西遊記·》:道高一尺,魔高一丈。」拍案驚奇·三六》:道高一尺,魔高一丈冤業隨身終須還帳。」比喻一事興起一事超過

virtue is one foot tall, the devil ten foot (idiom)​; It takes constant vigilance to stave off evil.