The joke goes, “How can you tell when a politician is lying? His lips are moving.” The same punchline applies to the devil. Anytime he opens his mouth or impresses a thought or speaks through the culture, he is lying. Jesus called satan “the father of lies” (John 8:44). Lying is his native tongue. But you may not realize that he is also the father of half-truths that look right and sound right but are not right.
Take his temptation of Jesus. Matthew 4 records this scene as the devil tried to coerce Jesus into sin. He questioned Jesus’ position as the Son of God (v. 3) enticing the Lord to turn stones into bread or jump from the highest point of the temple to “prove” Himself (v. 5). In the temple temptation, Satan actually quoted Scripture to Jesus: “If you are the Son of God, throw yourself down. For it is written: ‘He will command his angels concerning you, and they will lift you up in their hands so that you will not strike your foot against a stone'” (v. 6). That’s a good-sounding argument right out of Psalm 91:11-12. Should be a witness to Bible-believing fellow, right? But Satan stopped short of the whole truth in that passage. The very next verse speaks of his own demise: “You will tread upon the lion and the cobra; you will trample the great lion and the serpent” (Psalm 91:13). The rest of this Psalm describes how God will rescue, protect, deliver, and honor the one who loves and worships Him alone.
Many of us are on guard against satan’s lies – but we are not always as wise to his half-truths. They come at us from the world who is captive to the devil. They come stealthily from those who have mixed the pure Word of God with cultural whitewash. They come from pulpits and social media and “Christian” podcasts and blogs (yikes!) That is why it is vital to know the whole context of Scripture. The best way to tell a counterfeit bill is to know what the real thing looks like. The best way to discern a lie – or a half-truth – is to know the whole truth. Beloved, “They are not just idle words for you—they are your life” (Deut. 32:47).