Although Satan has some power and influence (no wonder he is called "the ruler of this world" (John 16:11), "the prince of the power of the air" (Ephesians 2:2), "the angel of light" (2 Corinthians 11:14), "the god of this world" (2 Corinthians 4:4), etc.), he is not omniscient and cannot read our thoughts. Nowhere in the Bible does it say that Satan can read our thoughts. The book of Job makes it very clear that Satan does not have that kind of power. If he did, he would have known that Job would never denounce God.
Even though Satan can't read our minds, he still has an advantage over us: Satan has been watching people and human nature for thousands of years (Job 1:6-7).
You could say that Satan and his demons are experts in human behavior. He knows how we respond to temptation. He and his demons can easily guess what we are thinking. Therefore, it is important to know how Satan approaches us and how he works. He certainly does not do it with horns, pitchforks, brimstone, and a scary Halloween mask. Satan is described as "the angel of light" (2 Corinthians 11:14). However, when we know the character of Satan and submit to the Spirit of God, he will flee (James 4:7).
