Our passage tells us that God is not in all the thoughts of the wicked (Psalm 10:4). It also points out that the thoughts of the wicked “are thoughts of iniquity” (Isaiah 59:7). Obviously, the wicked despise the Lord in their thoughts, but the Lord also despises the thoughts of the wicked. This is why we are told that “The thoughts of the wicked are an abomination to the LORD” (Proverbs 15:26). King David, whom God called “a man after mine own heart” (Acts 13:22), added that the thoughts of the wicked were against him for evil (Psalm 56:5). These wicked thoughts are based upon pride (Psalm 10:4). Conversely, a man yielded to the Lord desires to bring “into captivity every thought to the obedience of Christ” (2 Corinthians 10:5).
The Devil was created perfect in every aspect (Ezekiel 28:15) with complete capacity to do right. Yet, he was also created with a free will to choose whether to do right or to do wrong. Sometime in the distant past, he chose to abide “not in the truth.” This conscious decision to depart from the truth caused him to become the “father” of lies. In one form or another, every lie traces back to the work of the Devil. As the enemy of God, Satan wants to deceive God’s creation into believing a lie so that rejecting the truth and remaining condemned in darkness (2 Corinthians 4:4) seems like the natural thing to do. Satan incorporates every deceptive means at his disposal. One of his main tactics is to convince people that there are many ways to heaven (good works, baptism, church membership, etc.) and many ways to know the truth (feelings, science, circumstances, etc.). Yet, the Bible emphatically proves that God is truth and His word is truth and only through God and His word are we assured of learning and knowing truth.
