[177] [cap.37] No one, therefore, of all the objects of human anxiety or of human labour, is of any importance or value; but every such thing is a mere shadow or breath, disappearing before it can get any firm footing; for it comes and then again it departs, like the ebbing tide. For the sea, in its ebb and flow, is at one time borne forwards with great violence, and roaring, and noise, and overflowing its bounds makes a lake of what has previously been dry land; and, at another time, it recedes and makes a large portion of what has been sea, dry land.