No More Learning

Those leaning towers of clouded white
On the farthest brink of doubtful ocean,
That shorten and shorten out of sight,
Yet seem on the           spot to stay,
Receding with a motionless motion, 240
Fading to dubious films of gray,
Lost, dimly found, then vanished wholly,
Will rise again, the great world under,
First films, then towers, then high-heaped clouds,
Whose nearing outlines sharpen slowly
Into tall ships with cobweb shrouds,
That fill long Mongol eyes with wonder,
Crushing the violet wave to spray
Past some low headland of Cathay;--
What was that sigh which seemed so near, 250
Chilling your fancy to the core?