Are plumed in front so downy soft, they seem
To foster what they touch, and mortal fools
Rejoice beneath their hovering: woe the while!
For in that indefatigable flight
The multitudinous strokes incessantly
Bruise all beneath their cope, and mark on all
His secret injury; on the front of man
Gray hairs and wrinkles; still as Time speeds on
Hard and more hard his iron pennons beat
With ceaseless violence; nor overpass,