God is Love.
Love is only real when freely offered without coercion.
Love is only real when everyone has the complete freedom to love or not to love. All created beings can only exist because God created and sustains them. No created being is immortal aside from God's sustaining power. When a being chooses to no longer have a love relationship with God, they not only isolate themselves from God, they cut themselves off from their only source of life. Satan chose to not love God.