You shall worship no other god, for the LORD, whose name is Jealous, is a jealous God. Exodus 34:14
“Wrath is cruel, anger is overwhelming, but who can stand before jealousy?” wrote Solomon, speaking of the human sin of covetousness, the “green-eyed monster” (Proverbs 27:4). Such is the jealousy that contributes to such a large percentage of murders each year – literally as well as in the sense of heart-level murder (Matthew 5:21-22). Jealousy-fueled hatred is ugly, obsessive, and alienating. And it is absurdly proud.
Yet, God tells Moses in Exodus 34 that his very name is “Jealous.” Throughout the Pentateuch and the rest of the Bible, God says the reason he hates idolatry is because he is a jealous God (e.g. Deut 4:23-24, Ezek 8:3-5, 1 Cor 10:21-22). God’s jealousy is worlds different from our self-obsessed covetousness. The jealousy of God is a holy zeal to establish and protect the love-relationship between himself and his people. It is analogous to the jealousy of a wife for the husband she loves, which adultery so deeply and penetratingly wounds. A marriage which adultery does not affect is a sham, and loveless.
The companion of God’s jealousy is not hatred, but love, a love that is righteous and relentless. If you read the Old Testament, you cannot help but notice that the biblical God is intensely concerned, and intimately involved, with the lives of the humans he has made. He cares; about our lives, our suffering, our actions (whether good or evil), and most fundamentally, how our hearts are related to himself. He sends plagues, he parts seas, he creates nations, he destroys nations, he decrees laws about what animals to eat and what clothes to wear, he rains down fire, he rescues the poor from their oppressors, he whispers in the storm, because he is a jealous God.
The fact that he knows, and passionately cares about, the thoughts and attitudes of our hearts is, on the one hand, terrifying. He knows as no one else does the darkest corners of my depravity. He sees how much I love to hate, how little I love to trust him, how little I thank him. He sees my excuses. He sees the ridiculous struggle I go through to carry out even the most insignificant acts of selflessness, the struggle to which all others are blind. He knows, and he cares, and he hates my sin with ferocity. The hatred I am learning to feel toward my sin pales in comparison to the reaction of his holy nature against it. He is a jealous God, jealous for his own glory, jealous for my worship. My spiritual adultery against my Creator is uglier than the wickedest affair, the most flagrant betrayal. (If you want to know what it’s like, see, for example, Ezekiel 16.)
God’s jealousy scares me, because I know how far short I fall. It also makes me cry, and sing, and hardly know what to do with myself, when I think of how he loves me. God is jealous for me. God is the prodigal son’s father in Luke 15, running out to me, embracing me, kissing me, hardly able to express his joy at having me home. He is the prostitute’s husband in Hosea 2, romancing me all over again, betrothing me to himself in tenderness, in love determined to win me back. He is, most of all, the man on the cross, dying in torment, declaring in paradoxical victory, “It is finished.” My sin, atoned; my debt, paid in full; my inheritance, secured forever.
He is a jealous God. He is jealous for his glory, tolerating no rivals, going to every length imaginable to protect the relationship between himself and his creation, avenging himself in justice when that relationship is violated. He is jealous for you, whoever you are, whatever you have done, for “he yearns jealously over the spirit he has made to dwell in us” (James 4:5 ESV). He wants you to be close to him, to experience his mercy, to be who you are and who you are meant to be by living in a right relationship to him by faith.
But I do not account my life of any value nor as precious to myself, if only I may finish my course and the ministry that I received from the Lord Jesus, to testify to the gospel of the grace of God. Acts 20:24
The counterpart of God’s jealousy in us is zeal: zeal for God’s glory, passion to show his love to other people. Paul had it – see above. Jesus never lived a moment without it – his disciples recognized the scripture “zeal for your house will consume me” as describing him perfectly (John 2:17). He said, “My food is to do the will of him who sent me and to finish his work” (John 4:34). If any of us understands God’s jealousy in any sense whatever, zeal for him simply becomes the appropriate response. Lukewarm people, lukewarm churches, respectable though they may be, are inadequate for a God like this one. He is too amazing, his gospel too good, to be an afterthought, or anything other than the goal and glory of our lives.