Nor Nature's guiltless life alone—
But that which lives on blood and rapine; nay,
Charter'd with larger liberty to slay
Their guiltless kind, the tyrants of the air
Soar zenith-upward with their screaming prey,
Making pure heaven drop blood upon the stage
Of under earth, where lion, wolf, and bear,
And they that on their treacherous velvet wear
Figure and constellation like your own,
With their still living slaughter bound away
Over the barriers of the mountain cage,
Against which one, blood-guiltless, and endued
With aspiration and with aptitude
Transcending other creatures, day by day
Beats himself mad with unavailing rage!