From Su Shi's (
苏轼) Song-dynasty ci
《水调歌头·明月几时有》 (Prelude to Water Melody). Full passage:
人有悲欢离合,月有阴晴圆缺,此事古难全, 'people have sorrows and joys, partings and reunions; the moon has its dark and bright, its waxing and waning, such things have never been whole.' Written for the 1076 Mid-Autumn Festival while Su was separated from his brother Su Zhe.