《礼记·乐记》
因此，这样的乐，其清澈明朗像天，其无所不载像地，其终而复始像四时，其周回旋转像风雨。
是故清明象天，广大象地，终始象四时，周还象风雨。
Therefore, such music is as clear and bright as the heavens, as all-encompassing as the earth, as unceasing as the four seasons, and as ever-turning as the wind and rain.