If Satan can so befog and deceive the human mind, and lead mortals to think there is an inherent power in themselves to accomplish great and good works, they cease to rely upon God to do that for them which they think exists in themselves to do. They acknowledge not a superior power. They give not God the glory He claims, and which is due to His great and excellent Majesty. Satan's object is thus accomplished. He exults that fallen man presumptuously exalts himself, as he exalted himself in heaven, and was thrust out. He knows that the ruin of man is just as sure if he exalts himself as his was certain. MYP 58.2