One of the fascinating consequences of PL's incredible storytelling and poetry is to humanize Satan. Unlike the Son of God, or God themselves, Satan seems far more multifaceted. He has hopes, dreams, ambitions, and ruminates and obsesses over his own failings as well whether freedom from tyranny, as he sees it, is worth getting cast out of heaven for. To him, he lost paradise. These things make him feel alive in the poem, like a real person, a creation entirely Milton's own.