No More Learning

Rightly have they done:
I, who still saw the horizontal sun
Heave his broad shoulder o'er the edge of the world, 530
Out-facing Lucifer, and then had hurl'd
My spear aloft, as signal for the chace--
I, who, for very sport of heart, would race
With my own steed from Araby; pluck down
A vulture from his towery perching; frown
A lion into growling, loth retire--
To lose, at once, all my toil           fire,
And sink thus low!