Hebrews 6:18 teaches that God has given believers two unchangeable things, his promise and his oath, which make it impossible for him to lie, so that those who have run to him for safety can hold firmly to the hope placed before them. The verse is written by the author of Hebrews, traditionally understood as a letter addressed to Jewish Christians who needed reassurance that God’s promises to Abraham could be trusted.
That by two immutable things, in which it is impossible for God to lie, we may have a strong encouragement, who have fled for refuge to take hold of the hope set before us.
Hebrews 6:18 (WEB)
What Hebrews 6:18 Means
The phrase “two immutable things” points to God’s promise and the oath he added to it. The author is saying that God did not leave his word bare. He bound himself with an oath, which in the ancient world was the strongest form of confirmation, so that his people would see how settled his purpose is. Nothing about God’s plan can shift.
The phrase “impossible for God to lie” is the heart of the verse. Human beings sometimes break promises, and so we sometimes need oaths to back them up. God has no such weakness. His word is true by his very nature, so the believer’s confidence rests on who God is, not on how well the believer feels or performs.
The verse does not promise that life will be easy or that every prayer will turn out as we picture it. What it promises is that God will keep his word about the hope he has set before his people, and that this certainty is strong enough to steady a frightened heart.
The Context of Hebrews 6:18
Hebrews was written to a community that was tired, pressured, and tempted to drift away from Christ. The author warns them against spiritual laziness and then points them back to Abraham, who waited patiently and received the promise. Verse 15 says Abraham “obtained the promise” after enduring, and verse 17 explains that God confirmed his promise with an oath so that the heirs of that promise could see his purpose clearly.
Just before verse 18, the author uses the courtroom habit of swearing by something greater to end a dispute. Right after it, he describes the hope as an anchor of the soul that enters behind the veil, where Jesus has gone ahead as forerunner and high priest. Read this way, the verse is not a general comfort. It is an invitation to grab hold of Christ himself as the place where God’s unbreakable promise is fulfilled.
Key Phrases in Hebrews 6:18
Numbers 23:19
God is not a man, that he should lie, nor a son of man, that he should repent. Has he said, and will he not do it? Or has he spoken, and will he not make it good?
(WEB)
This verse states plainly that God is not a man who would lie or change his mind, which is the same confidence Hebrews 6:18 builds on. Reading it alongside Hebrews shows that God’s unchanging faithfulness is a consistent theme across Scripture.
Hebrews 10:23
Let us hold fast the confession of our hope without wavering; for he who promised is faithful.
(WEB)
Here the author urges his readers to hold fast to the confession of their hope without wavering, because the one who promised is faithful. It is a practical continuation of the encouragement in Hebrews 6:18, calling believers to steady, persevering trust.
A Short Prayer From Hebrews 6:18
Father, you have not left us to guess whether your promises will hold. You have bound your word with an oath, and you cannot lie. When fear rises in me, remind me that my hope rests on you and not on my own strength. Help me to run to you for refuge and to take firm hold of the hope you have set before me. Keep my heart steady today, and let your faithfulness be the anchor of my soul. Amen.
