Verse-by-Verse Commentary
The Book of Isaiah
Chapter 43: Thou Art Mine
Chapter 43 is one of the tenderest and most towering chapters in Isaiah. It opens with words every believer has clung to: 'Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine. When thou passest through the waters, I will be with thee.' It rises to the mightiest statement of the one God in all the prophets, 'I am he... beside me there is no saviour.' God promises to do 'a new thing' and make 'a way in the wilderness, and rivers in the desert.' And it reaches the mountaintop of grace: 'I, even I, am he that blotteth out thy transgressions for mine own sake, and will not remember thy sins.'
About This Commentary
This is a verse-by-verse study of Isaiah chapter 43, part of the Book of Comfort (chapters 40-66). For each section you will find the KJV text, the Hebrew words that sharpen the meaning, plain explanation, and a Gospel Focus. This chapter joins the tenderest assurance of belonging with the strongest declaration of the one God and Saviour, and ends with the glory of free forgiveness. Every Scripture quotation is from the King James Version.
Setting the Stage
Thou Art Mine
God has redeemed His people and called them by name; through waters and fire He is with them.
No Saviour Beside Me
His people are His witnesses that "I am he... beside me there is no saviour," the one true God.
A Way in the Wilderness
God will do a new thing, making a road in the desert and rivers for His chosen to drink.
I Blot Out Thy Sins
Though His people wearied Him with sin, He blots out their transgressions for His own sake.
Fear Not, Thou Art Mine (Isaiah 43:1-7)
God speaks the deepest assurance to His people: they are redeemed, called by name, and His own, and He promises His presence through every flood and fire, for He is their Saviour who loves them and will gather them from the ends of the earth.
When Thou Passest Through the Waters
"But now thus saith the LORD that created thee, O Jacob, and he that formed thee, O Israel, Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine. When thou passest through the waters, I will be with thee; and through the rivers, they shall not overflow thee: when thou walkest through the fire, thou shalt not be burned; neither shall the flame kindle upon thee. For I am the LORD thy God, the Holy One of Israel, thy Saviour: I gave Egypt for thy ransom, Ethiopia and Seba for thee. Since thou wast precious in my sight, thou hast been honourable, and I have loved thee: therefore will I give men for thee, and people for thy life. Fear not: for I am with thee: I will bring thy seed from the east, and gather thee from the west; I will say to the north, Give up; and to the south, Keep not back: bring my sons from far, and my daughters from the ends of the earth; Even every one that is called by my name: for I have created him for my glory, I have formed him; yea, I have made him."
Hebrew Study
"I have redeemed thee," gealtikha (גְּאַלְתִּיךָ), from goel. To buy back as a kinsman-redeemer. Paired with "I have called thee by thy name; thou art mine," it declares both the price paid and the personal bond. God does not save an anonymous crowd; He redeems and names each one as His own.
"thou art mine," li attah (לִי אָתָּה). Two small Hebrew words carrying immense weight: "to me you belong." This is the language of covenant and of love, the ground of every "fear not." The redeemed are God's personal possession, and nothing that passes over them can take them from His hand.
Explanation
After the blindness and judgment of chapter 42, God says "But now", grace breaks in. He speaks as Creator and Redeemer: "Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine." Then comes the promise of His presence in every trouble: "When thou passest through the waters, I will be with thee... when thou walkest through the fire, thou shalt not be burned." Notice He does not say the waters and fire will not come, but that He will be with His people in them, and they will not be overwhelmed. The reason is who He is: "I am the LORD thy God, the Holy One of Israel, thy Saviour." He values His people beyond price, "since thou wast precious in my sight... I have loved thee", and He will gather them from every direction, "from the east... from the west... from the north... from the south... my sons from far, and my daughters from the ends of the earth." Everyone "called by my name" was "created... for my glory." Redeemed, named, loved, gathered, and made for God's glory, this is who His people are.
Gospel Focus
These verses have carried more of God's people through fire and flood than almost any others. "Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine." Here is the gospel's double gift: redemption (the price paid to buy us back, fulfilled when Christ redeemed us "with his own blood," Acts 20:28) and belonging ("thou art mine"). We are not our own; we are "bought with a price" (1 Corinthians 6:20), and we belong to Him. And see the shape of His promise in verse 2. He does not promise a life without deep waters or hot fire; He promises His presence in them, "I will be with thee." The three Hebrews learned this literally in Nebuchadnezzar's furnace, where a fourth walked with them and not a hair was singed (Daniel 3:25-27). Whatever flood is rising over you or fire closing around you, the promise is not that you will be spared the trial but that you will not be overwhelmed or consumed, because He is with you. And the One who says "thou art mine" is the same God who came to us in Jesus, the Saviour who calls His sheep by name (John 10:3). You are redeemed, named, precious, and loved. Fear not; you are His.
Beside Me There Is No Saviour (Isaiah 43:8-13)
God calls His people as witnesses in the court of the nations to testify that He alone is God, declaring in the strongest terms that there is no God before or after Him and no saviour beside Him.
I, Even I, Am the LORD
"Bring forth the blind people that have eyes, and the deaf that have ears. Let all the nations be gathered together, and let the people be assembled: who among them can declare this, and shew us former things? let them bring forth their witnesses, that they may be justified: or let them hear, and say, It is truth. Ye are my witnesses, saith the LORD, and my servant whom I have chosen: that ye may know and believe me, and understand that I am he: before me there was no God formed, neither shall there be after me. I, even I, am the LORD; and beside me there is no saviour. I have declared, and have saved, and I have shewed, when there was no strange god among you: therefore ye are my witnesses, saith the LORD, that I am God. Yea, before the day was I am he; and there is none that can deliver out of my hand: I will work, and who shall let it?"
Hebrew Study
"that I am he," ki ani hu (כִּי אֲנִי הוּא). "I am he", the great self-declaration of the one God. Jesus takes this very phrase, "I am he," and applies it to Himself repeatedly in John's Gospel (John 8:24, 58; 18:5-6), claiming the identity of the LORD who speaks in Isaiah.
"beside me there is no saviour," eyn mibbaladay moshia (אֵין מִבַּלְעָדַי מוֹשִׁיעַ). There is no other Saviour, none at all. Since only the LORD saves, and Jesus is the Saviour, "neither is there salvation in any other" (Acts 4:12), Jesus is that one LORD and Saviour, God with us.
Explanation
God resumes the courtroom scene. He summons the nations to bring their gods and their witnesses to prove any rival claim: "who among them can declare this, and shew us former things?" None can. Then He turns to His own people: "Ye are my witnesses, saith the LORD, and my servant whom I have chosen." Their whole history, redemption from Egypt, provision, prophecy fulfilled, is testimony that He alone is God. And He states it in the most absolute terms in all of Scripture: "understand that I am he: before me there was no God formed, neither shall there be after me. I, even I, am the LORD; and beside me there is no saviour." There was no God before Him and will be none after; there is no other Saviour at all. He alone "declared, and have saved, and I have shewed." He is eternal, "before the day was I am he," and sovereign, "there is none that can deliver out of my hand: I will work, and who shall let it?" No one can reverse what this God does.
Gospel Focus
This passage is the bedrock of Apostolic, Oneness faith: there is one God. "I am he: before me there was no God formed, neither shall there be after me. I, even I, am the LORD; and beside me there is no saviour." God could not have said it more plainly, there is one God, and one Saviour, and they are the same LORD. Now hear the gospel: the New Testament calls Jesus "our Saviour" again and again, and declares, "neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved" (Acts 4:12). If "beside me there is no saviour," and Jesus is the Saviour, then Jesus is not a second God beside the Father; He is the one LORD Himself, come to us in flesh. This is why Jesus repeatedly says "I am he" in John's Gospel, taking the very words of Isaiah 43 onto His own lips (John 8:24, 58). To confess Jesus as Saviour is to confess Him as the one God our Saviour. And notice the beautiful calling in this passage: "Ye are my witnesses." God's people are His evidence in the world, living testimony that He alone is God and Saviour. Jesus repeated this word to the church, "ye shall be witnesses unto me" (Acts 1:8). Your redeemed life is meant to be a witness that there is one God, one Saviour, and no other name.
Behold, I Will Do a New Thing (Isaiah 43:14-21)
The Redeemer who once opened a path through the sea promises something even greater: a new thing, a road through the wilderness and rivers in the desert, so that His chosen people may drink and show forth His praise.
Rivers in the Desert
"Thus saith the LORD, your redeemer, the Holy One of Israel; For your sake I have sent to Babylon, and have brought down all their nobles, and the Chaldeans, whose cry is in the ships. I am the LORD, your Holy One, the creator of Israel, your King. Thus saith the LORD, which maketh a way in the sea, and a path in the mighty waters; Which bringeth forth the chariot and horse, the army and the power; they shall lie down together, they shall not rise: they are extinct, they are quenched as tow. Remember ye not the former things, neither consider the things of old. Behold, I will do a new thing; now it shall spring forth; shall ye not know it? I will even make a way in the wilderness, and rivers in the desert. The beast of the field shall honour me, the dragons and the owls: because I give waters in the wilderness, and rivers in the desert, to give drink to my people, my chosen. This people have I formed for myself; they shall shew forth my praise."
Hebrew Study
"a new thing," chadashah (חֲדָשָׁה). Something fresh and unprecedented. God who split the Red Sea now promises a greater deliverance, so wonderful that the old is not to be dwelt on. It anticipates the ultimate "new thing," the new covenant and new creation in Christ, "if any man be in Christ, he is a new creature" (2 Corinthians 5:17).
"they shall shew forth my praise," tehillati yesapperu (תְּהִלָּתִי יְסַפֵּרוּ). To recount, declare, tell out God's praise. This is the very purpose for which God formed His people, "This people have I formed for myself", echoed in "ye should shew forth the praises of him who hath called you" (1 Peter 2:9).
Explanation
God speaks again as "your redeemer, the Holy One of Israel," and reminds them of His power over Babylon and His past mighty act, the Red Sea: He "maketh a way in the sea, and a path in the mighty waters," drowning Pharaoh's "chariot and horse," who "are extinct... quenched as tow." But then He says something surprising: "Remember ye not the former things, neither consider the things of old." As glorious as the exodus was, it is not to hold their gaze, because "Behold, I will do a new thing; now it shall spring forth." He will make "a way in the wilderness, and rivers in the desert," providing for His people so lavishly that even "the beast of the field shall honour me." All of it is "to give drink to my people, my chosen," and for one great purpose: "This people have I formed for myself; they shall shew forth my praise." God's redemption always aims at worship; He forms a people to declare His praise.
Gospel Focus
"Behold, I will do a new thing." God is never confined to His past acts, however great. The generation that loved to rehearse the Red Sea is told not to let even that hold them, because God is about to do something new. This is the pattern that runs to its climax in the gospel: the "new thing" points beyond the return from Babylon to the new covenant in Christ's blood (Luke 22:20), the "new creature" He makes of every believer (2 Corinthians 5:17), and finally the "new heaven and a new earth" (Revelation 21:1). Our God specializes in making a way where there is no way, "a way in the wilderness, and rivers in the desert." When you are in a trackless place with no path forward and no water in sight, this is your God, He opens roads through wildernesses and pours rivers into deserts. And notice why: "to give drink to my people, my chosen. This people have I formed for myself; they shall shew forth my praise." You were made for worship. The rivers He gives in your wilderness are meant to overflow in praise. Do not merely remember the old mercies; watch for the new thing God is doing, drink from the rivers He provides, and show forth the praise of the One who formed you for Himself.
I Blot Out Thy Transgressions (Isaiah 43:22-28)
God confronts His people's failure to worship Him, their weariness and their sin, and then, at the lowest point, speaks the highest grace: He Himself blots out their transgressions for His own sake and will not remember their sins.
For Mine Own Sake
"But thou hast not called upon me, O Jacob; but thou hast been weary of me, O Israel. Thou hast not brought me the small cattle of thy burnt offerings; neither hast thou honoured me with thy sacrifices. I have not caused thee to serve with an offering, nor wearied thee with incense. Thou hast bought me no sweet cane with money, neither hast thou filled me with the fat of thy sacrifices: but thou hast made me to serve with thy sins, thou hast wearied me with thine iniquities. I, even I, am he that blotteth out thy transgressions for mine own sake, and will not remember thy sins. Put me in remembrance: let us plead together: declare thou, that thou mayest be justified. Thy first father hath sinned, and thy teachers have transgressed against me. Therefore I have profaned the princes of the sanctuary, and have given Jacob to the curse, and Israel to reproaches."
Hebrew Study
"blotteth out," mocheh (מֹחֶה). To wipe away, erase, as writing is wiped from a scroll. God does not merely overlook sin; He wipes the record clean, "blotting out the handwriting of ordinances that was against us... nailing it to his cross" (Colossians 2:14). The debt is not ignored but erased.
"for mine own sake," lemaani (לְמַעֲנִי). God forgives not because of anything in us but for His own name's sake, His own glory, His own mercy. This removes all boasting and all doubt: since His forgiveness rests on His character, not our worthiness, it is utterly secure.
Explanation
God turns to expose the sad truth of His people's hearts. For all their religion, "thou hast not called upon me, O Jacob; but thou hast been weary of me, O Israel." They had grown tired of God. Their offerings, where they made them, were empty, and worse, "thou hast made me to serve with thy sins, thou hast wearied me with thine iniquities." God, who never wearied them with heavy demands, was Himself wearied by their sin. And then, at this lowest point of the indictment, comes the highest word of grace in the chapter: "I, even I, am he that blotteth out thy transgressions for mine own sake, and will not remember thy sins." Against a people who wearied Him with iniquity, God announces free, complete forgiveness, not earned, not deserved, but given "for mine own sake." He invites them to reason it out with Him, "Put me in remembrance: let us plead together," and honestly names the long history of sin, "Thy first father hath sinned, and thy teachers have transgressed." Yet the shining center stands: the God they wearied is the God who wipes their sins away.
Gospel Focus
Verse 25 is one of the brightest gospel verses in the Old Testament: "I, even I, am he that blotteth out thy transgressions for mine own sake, and will not remember thy sins." Notice three things. First, who forgives: "I, even I", God Himself, personally, is the One who wipes away sin; forgiveness is His own act, not something we achieve. Second, how completely: He "blotteth out" the record and "will not remember thy sins", the same promise of the new covenant, "their sins and their iniquities will I remember no more" (Hebrews 8:12). Third, and most astonishing, why: "for mine own sake." He forgives not because we have earned it, we had just "wearied" Him with our sins, but for His own name and mercy and glory. This is the ground of all our assurance. If God forgave us for our sake, our forgiveness would be as unstable as we are; but because He forgives "for mine own sake," it rests on His unchanging character, and it cannot fail. This is what Christ accomplished at the cross, "blotting out the handwriting... nailing it to his cross" (Colossians 2:14). Your sins have wearied God, and He knows it, yet He says, "I, even I, am he that blotteth out thy transgressions." Come to Him, plead His own promise, and rest in a forgiveness that stands on His name, not yours.
Chapter 43 in Review
Isaiah 43 weds the tenderest comfort to the highest theology. It opens with belonging: "Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine," and the promise of God's presence through every flood and fire, "when thou passest through the waters, I will be with thee." It rises to the strongest declaration of the one God in the prophets: "I am he: before me there was no God formed, neither shall there be after me. I, even I, am the LORD; and beside me there is no saviour," with His people called to be His witnesses. It promises a "new thing," a way in the wilderness and rivers in the desert, for a people formed to "shew forth my praise." And it climbs, at the very point of exposing their sin, to the summit of grace: "I, even I, am he that blotteth out thy transgressions for mine own sake, and will not remember thy sins."
For the Apostolic reader this chapter is a treasure chest of Christ. The Redeemer who says "thou art mine" is Jesus, who bought us with His blood and calls His sheep by name. The declaration "beside me there is no saviour" is the foundation of Oneness faith, for the New Testament names Jesus as the one Saviour in whom alone is salvation, "neither is there salvation in any other." Jesus took the very words "I am he" onto His own lips, claiming the identity of the LORD who speaks here. The "new thing" points to the new covenant and new creation He brings. And the free forgiveness of verse 25, God blotting out our sins "for mine own sake," is the very heart of the gospel, secured at the cross where the handwriting against us was nailed and cancelled. You are redeemed, named, and His; He is with you in the fire; He alone is God and Saviour; and He has blotted out your sins for His own sake. Fear not: thou art mine.
- "I have redeemed thee, I have called thee by thy name; thou art mine", redemption and belonging together (43:1; 1 Corinthians 6:20).
- God promises His presence in trials, not exemption from them: "when thou passest through the waters, I will be with thee" (43:2; Daniel 3:25).
- "Beside me there is no saviour", the one God and Saviour, the foundation of Apostolic faith, fulfilled in Jesus (43:10-11; Acts 4:12; John 8:24).
- God does a "new thing," making a way in the wilderness, pointing to the new covenant and new creation in Christ (43:19; 2 Corinthians 5:17).
- "I, even I, am he that blotteth out thy transgressions for mine own sake", free, complete, secure forgiveness (43:25; Hebrews 8:12; Colossians 2:14).
Questions for Reflection
- What "waters" or "fire" are you passing through now? How does "I will be with thee" change the way you face them?
- Do you truly believe you belong to God, "thou art mine"? How would living in that assurance change your fears?
- God's people are called His "witnesses." Is your life testifying that there is one God and one Saviour?
- How does it steady your assurance that God forgives "for mine own sake," resting on His character rather than your worthiness?
References & Sources
Scripture is quoted from the King James Version (KJV). The Hebrew terms are standard and can be checked in any Hebrew lexicon. Verses 10-11, "I am he... beside me there is no saviour," are among the strongest monotheistic declarations in Scripture; the phrase "I am he" (ani hu) is taken up by Jesus in John 8:24, 58 and 18:5-6, and "beside me there is no saviour" underlies Acts 4:12. The promise of God's presence in fire recalls Daniel 3; the "new thing" (verse 19) points forward to the new covenant (Luke 22:20) and new creation (2 Corinthians 5:17); and the free pardon of verse 25 is fulfilled in Christ (Colossians 2:14; Hebrews 8:12). If anything here does not look right, a verse, a reference, or a wording, please tell us at info@FruitBearers.net. Thank you for helping us keep Bible Learning error free.
- Redeemed, named, and His, through waters and fire: Isaiah 43:1-7; 1 Corinthians 6:20; Daniel 3:25.
- "Beside me there is no saviour"; the one God and His witnesses: Isaiah 43:8-13; Acts 4:12; John 8:24; Acts 1:8.
- The new thing: a way in the wilderness, rivers in the desert: Isaiah 43:14-21; 2 Corinthians 5:17; 1 Peter 2:9.
- Free forgiveness "for mine own sake": Isaiah 43:22-28; Hebrews 8:12; Colossians 2:14.