Brothered in use are they, in use and need.
See how the Serpent's many-coloured skin
Writhes hither, thither, with insidious heed,
Striving to maim one pinion. Shall the pest succeed?
Bred far below, in dank malarious slime,
That Serpent hath no power to soar in air,
Save clinging to winged creatures that can climb
The empyrean; yet from its foul lair
It sprang to the broad wings it would ensnare,
Encoil, enshackle, hamper, break, drag down.