《淮南子·泰族训》
黄河因为曲折连绵，所以能流向远方；高山因为绵延深长，所以能既高又大；大道因为悠游，所以能化育万物。
河以逶蛇，故能远；山以陵迟，故能高；道以优游，故能化。
The Yellow River can flow far because of its winding course; the mountain can be both high and great because of its long and vast extension; the great way can nourish all things because of its endlessness.