"Which Thou and I alone of living thingsBehold with sleepless eyes! regard this Earth" - who wrote these lines?

Shelly was an English Romantic poet whose passionate search for personal love and social justice was gradually channelled from overt actions into poems that rank with the greatest in the English language.
His famous literary works are:
- Prometheus Unbound (1820),
- A Defense of Poetry (1820),
- Ode to the West Wind,
- To a skylark,
- The Revolt of Islam,
- Alastor,
- Ozymandias,
- Queen Mab,
- The Cloud.

Source: Britannica.com

The lines mentioned in the question found in "Prometheus Unbound".


"Monarch of Gods and Dæmons, and all Spirits
But One, who throng those bright and rolling worlds
Which Thou and I alone of living things
Behold with sleepless eyes! regard this Earth
Made multitudinous with thy slaves, whom thou
Requitest for knee-worship, prayer, and praise,
And toil, and hecatombs of broken hearts,
With fear and self-contempt and barren hope."