ANSWER: Unlike the devil, the Bible clearly informs us that Jesus Christ could read the minds of others. In the book of Matthew he directly states he has this power when he says the following.
4. But Jesus, perceiving their thoughts, said, "Why are you thinking evil in your hearts? (Matthew 9, see also Luke 9:47)
The word of God reads and judges our thoughts and attitudes. Everything we think can be clearly seen by him. In the book of Hebrews, the apostle Paul states that God's spirit can find out all of the thoughts and desires in our hearts. Absolutely nothing is hidden from the Great God! Our Father has the ability to know what does and does not motivate us. Everything that can be known about us, down to the number of hairs on our head, is laid bare to our Creator (Matthew 10;30, see also Hebrews 4:12 - 13).
The devil knows HOW humans think because he thinks the same way. He knows the weaknesses of human beings and therefore knows how to tempt us. Jesus referred to this commonality of thinking when he rebuked Peter (who was not yet fully converted) at a moment when the devil was influencing him to think and say certain things. Peter, upon hearing Christ say he must be put to death in Jerusalem by the Jewish religious leaders, began to correct him! Jesus did not hesitate to answer what was being said.
'Get away from me, Satan! You are an obstacle in my way, because these thoughts of yours don’t come from God, but from human nature' (Matthew 16:23)
The devil cannot and does not know our innermost thoughts. He simply cannot read our minds, otherwise, he would not have wasted his energy trying to tempt Job (Job 1:6 - 12), or even Jesus when he was a flesh and blood human (Matthew 4:1 - 11).
The devil certainly does have the power to deceive those who do not follow God. As god of this world, he has deceived the masses regarding the truth, God's REAL plan of salvation and mankind's great and wonderful destiny. See our series on what demons CAN and CANNOT do for more information on this fascinating subject!
Jesus, when He died for our sins and began to establish his kingdom, put Satan under the power and authority. The devil no longer has power over us - and through God we can assurred that he cannot read our thoughts.