Both [Satan and Melkor/Morgoth] are loud in their defiance, claiming that they would "rather rule in hell than serve in heaven". One might have admired these rebel angels if one believed their defiance was in the name of liberty- however, both lied. Their rebellions were only provoked by envy and the usurpers' wishes to take the perceived tyrants' place. Never were two more natural tyrants than Morgoth and Satan.