From
李白's Tang
《经乱离后天恩流夜郎忆旧游书怀赠江夏韦太守良宰》:
清水出芙蓉,天然去雕饰 (A lotus rising from clear water, natural, without carved ornament.) Li Bai used it to praise a friend's plain and powerful style; later generations adopted it as a touchstone aesthetic of
自然 (naturalness).