川泽纳污,山薮藏疾,瑾瑜匿瑕。
解释:河流川泽中有污水,深山草野中藏有瘴气,美玉也有微小的瑕疵。
Poetry should surprise by a fine excess and not by singularity—it should strike the reader as a wording of his own highest thoughts, and appear almost a remembrance.