習慣若自然 [ㄒㄧˊ ㄍㄨㄢˋ ㄖㄨㄛˋ ㄗˋ ㄖㄢˊ; xi2 guan4 ruo4 zi4 ran2] habit becomes nature (idiom); get used to something and it seems inevitable second nature same as 習慣成自然 ◄ ►