If anyone thinks he is something when he is nothing, he deceives himself
Satan promotes his lies in the world by encouraging us to self-deception. We deceive ourselves when we think of ourselves more highly than we ought to think. "But I know who I am," you say. "I'm a child of God, I'm seated with Christ in the heavenlies, I can do all things through Him. That makes me pretty special." Yes, you are very special in the eyes of God. But you are what you are by the grace of God (1 Corinthians 15:10). The life you live, the talents you possess, and the gifts you have received are not personal accomplishments; they are expressions of God's grace. Never take credit for what God has provided; rather, take delight in accomplishing worthwhile deeds which glorify the Lord.
Furthermore, we deceive ourselves when we think we are wise in this age (1 Corinthians 3:18, 19). It is the height of intellectual arrogance to assume wisdom without the revelation of God. "Professing to be wise, they became fools" (Romans 1:22). Sometimes we are tempted to think we can match wits and intellect with the god of this world. But we are no match for him. Whenever we think we can outsmart Satan on our own, we are prime candidates to be led astray by his craftiness.
However, Satan is no match for God. It is important for us not to lean on our own understanding, but to employ the mind of Christ and acknowledge Him in all our ways (Proverbs 3:5, 6; 1 Corinthians 2:16). We overcome the lies of Satan by divine revelation, not human research or reasoning. Satan is not impressed with our intellect; he is defeated by God's omniscience.
Prayer: Lord, help me not to think more highly of myself than I ought, nor to demean myself, because I am created in Your image.