“沧浪之水清兮,可以濯我缨;沧浪之水浊兮,可以濯我足。”孟子如是说。孔子观于河川而发出“逝者如斯乎,不舍昼夜”的感慨。郭璞《游仙诗》:“临川哀年迈,扶心独悲托。”滚滚流水仿佛消逝的青春岁月,握不住,留不了,充满了无奈,是人类千古以来共同的感伤。“月明星稀,乌鹊南飞”,这是曹操的月亮。“明月照积雪,朔风劲 “The clear water of the waves can lick me; the water of the waves can smash me,” Mencius said. Confucius observed the river and expressed his feelings of “the dead are so sad, don’t care about staying up late”. Guo Song’s “Que Xian Po”: “Linchuan mournful age, support heart alone care.” Rolling water seems to disappear in the youth, can not hold, can not stay, full of helplessness, is the common sentimental humanity from ancient times. “The star of the month is rare, Wujian flies south”. This is Cao Cao’s moon. "The moon shines snow, and the wind is strong