What is the immutability of God?

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The immutability of God is one of the most foundational truths of Scripture: God does not change and cannot change — not in His being, not in His counsel, not in His word, and not in His faithfulness. Morrish's Bible Dictionary gives a concise definition under "Immutability": Three things are said to be unchangeable: God's counsel, His word, and His oath. Heb. 6:17-18. To these certainty may be attached. In Mal. 3:6 we read, "I am Jehovah, I change not," and the Lord is "the same yesterday, and to-day, and for ever." Heb. 13:8. Morrish's Bible Dictionary The Name "Jehovah" Expresses Immutability The very name by which God revealed Himself to Israel carries this truth. An article in An Outline of Sound Words on "The Lord Revealing Himself" explains: Israel's God is the self-existing God, who ever is and never changes, and who has undertaken the deliverance and blessing of the people He has chosen for Himself. This was the Name of relationship that God was taking with Israel, a Name that implied the unchangeableness of His character, the One who would certainly perform all that He undertook to do in grace for His people. Unchangeable in Righteousness and Grace J. N. Darby, commenting on Malachi, shows that God's immutability operates in two directions — both judgment and mercy: All the evil-doers should be judged; for God was unchangeable, both in righteousness and grace. It was this which, after all, secured the existence of Israel, happen what might. J. N. Darby This is precisely the force of Malachi 3:6 — "I am Jehovah, I change not; therefore ye sons of Jacob are not consumed." Israel's failures were endless, but God's faithfulness was unchangeable, and that is what preserved them. The Immutability of Christ as Creator Darby applies this truth directly to the Person of Christ in his Synopsis of Hebrews 1, commenting on the quotation from Psalm 102: Humbled as He might be, He was the Creator Himself. He was ever the same; His years could never fail. It was He who had founded the heavens: He would fold them up as a garment, but He Himself would never change. He adds: The words translated, "Thou art the same," (Atta Hu) are by many learned Hebraists taken — at least Hu — as a name of God. At any rate, as unchangeably the same, it amounts to it. Darby summarises this as testifying to Christ's "eternal throne of righteousness; His unchangeable divinity as Creator of all things." J. T. Mawson echoes this, noting of Christ's divine titles: Some of these names belong to Him as having become Man, and as having died and risen again; others describe what He was before the pendulum of time began to swing, or ever the world was made — what He is in His own uncreated, unchangeable and eternal Being. J. T. Mawson The Unchangeableness of Christ as Guard Against Error William Kelly, commenting on Hebrews 13:8, draws out a remarkable practical consequence: The unchangeableness of Christ is the guard against being carried away. William Kelly The abiding sameness of the Lord Jesus — "the same yesterday, and to-day, and for ever" — is not merely a statement of His eternal deity; it is the very anchor that keeps the believer from being swept along by "divers and strange doctrines" (Hebrews 13:9). The Immutable Counsel of God — The Believer's Strong Consolation The Epistle to the Hebrews gives the immutability of God its most practical and precious application. An article on "The Counsel of God" explains: The writer of the Epistle to the Hebrews speaks of "the immutability" of God's counsel (6:17), showing that God, in His goodness comes down to meet man in his weakness, and to show that what He promises He will assuredly fulfil, He confirms what He has promised with His oath. God's counsel is indeed immutable, it can never be altered; there is no power in earth or heaven that is able to turn God away from what He has set Himself to do. How blessed it is that His immutable counsel has decreed our blessing. A writer in the Bible Treasury brings this to a climax: God's purpose is published, is proclaimed to the whole world, His immutable counsel confirmed by an oath, "That by two immutable things in which it was impossible for God to lie, we might have a strong consolation, who have fled to refuge to lay hold upon the hope set before us." An outline of Hebrews in An Outline of Sound Words captures the tenderness of this: How blessed to see the condescension of God, coming down to our creature weakness to show in a human way the immutability of His purpose; He first promised, then confirmed it with an oath, to give strong encouragement to the heirs of promise. Synthesis The immutability of God touches everything. His being does not change — He is "the same," the self-existent "I AM." His character does not change — He is unchangeably righteous and unchangeably gracious. His counsel does not change — what He has purposed He will accomplish, and no power in heaven or earth can alter it. And this truth extends fully to the Person of Christ, who as Creator founded the heavens and will fold them up, yet He Himself will never change; and who as the glorified Man is "the same yesterday, and to-day, and for ever." The practical bearing of all this is immense. God has not left His people to wonder whether His promises might fail. He gave His word, and then — stooping to human weakness — confirmed it with His oath: "two immutable things, in which it was impossible for God to lie." The immutability of God is the ground beneath the believer's feet, the anchor of the soul, and the spring of what Hebrews calls "strong consolation."

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