There is only one wish realisable on the earth; only one thing that can be perfectly attained: Death. And from a variety of circumstances we have no one to tell us whether it be worth attaining. A strange picture we make on our way to our chimaeras, ceaselessly marching, grudging ourselves the time for rest; indefatigable, adventurous pioneers. It is true that we shall never reach the goal; it is even more than probable that there is no such place; and if we lived for centuries and were endowed with the powers of a god, we should find ourselves not much nearer what we wanted at the end. O toiling hands of mortals! O unwearied feet, travelling ye know not whither! Soon, soon, it seems to you, you must come forth on some conspicuous hilltop, and but a little way further, against the setting sun, descry the spires of El Dorado. Little do ye know your own blessednes; for to travel hopefully is a better thing than to arrive, and the true success is to labour.