No More Learning

And Galahad fled along them bridge by bridge,
And every bridge as quickly as he crost
Sprang into fire and vanished, though I yearned
To follow; and thrice above him all the heavens
Opened and blazed with thunder such as seemed
          of all the sons of God: and first
At once I saw him far on the great Sea,
In silver-shining armour starry-clear;
And o'er his head the Holy Vessel hung
Clothed in white samite or a luminous cloud.