fully convinced that God was able to do what he had promised.
English Standard Version (ESV)
Abraham's profound faith wasn't just believing God would do what He promised, but deeply trusting that God possessed the absolute ability to do it, regardless of any humanly impossible circumstances. This conviction, that God's power was sufficient beyond all doubt, is what honored God and demonstrated the true nature of Abraham's righteousness.
fully convinced that God was able to do what he had promised.
English Standard Version (ESV)
Paul is explaining how Abraham was declared righteous not by following the law, but by his faith. This faith allowed him to believe God's promises even when they seemed impossible, like having a child in his old age, fully trusting God's power to make it happen. This is presented as the model for how all believers, Jewish and Gentile, are justified by faith in God's power to bring about His promises.
What does it truly mean to believe God?
Abraham's faith wasn't just wishful thinking. It was a deep-seated conviction in God's ability to perform, regardless of circumstances. The original language emphasizes being 'filled with assurance,' like a vessel overflowing with confidence.
Beyond Probability
This assurance meant Abraham didn't get bogged down by the 'how.' His 100-year-old body and Sarah's barrenness were massive obstacles, but his focus wasn't on the 'deadness' of his own situation. Instead, he looked to the God who is 'mighty' and capable of bringing life from what seemed impossible.
Trusting God's Power
True faith doesn't measure God's power by our limitations or by what seems likely. It rests on the character and omnipotence of God. When we are fully persuaded that God is able, our perspective shifts from insurmountable problems to divine solutions.
How does our faith give glory to God?
Abraham's faith wasn't just about getting a promise fulfilled; it was fundamentally about honoring God. By believing God's promise and His ability to perform it, Abraham gave God the highest praise.
The Ultimate Act of Worship
When we truly believe God – not just intellectually, but with our whole being – we are essentially saying, 'God, Your Word is true, and You are capable.' This is a profound act of worship that exalts His character and truthfulness. It's the ultimate affirmation of His trustworthiness.
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Avoiding the Pitfalls of Unbelief
Unbelief, on the other hand, dishonors God. It questions His integrity and power. Even when Abraham questioned how a child could be born, his question stemmed from astonishment, not a lack of trust in God's ability. He didn't try to 'figure it out' based on his own limited understanding or circumstances. Instead, he surrendered his 'own judgment to the Lord.'
Understand the original words
plērophorētheis · Greek Verb
Being completely certain or persuaded in one's mind, often implying an unshakable trust in God's reliability and power.
Theos · Greek Noun
The sovereign Creator and Ruler of the universe, the only true object of saving faith.
epēngeltai · Greek Verb
A formal declaration or covenantal pledge given by God, upon which the believer rests their hope and confidence.
Abraham's radical faith wasn't just about believing in God's promises; it was rooted in his profound conviction of God's absolute power to bring them about, even when humanly impossible, a faith echoed by those facing exile and doubt centuries later.
~1800 BC
God's Covenant with Abraham
God establishes a covenant with Abraham, promising him descendants and land, and that through him all nations would be blessed. This promise is later reaffirmed multiple times.
~1790 BC— this verse
Birth of Isaac
Isaac, the son of the promise, is miraculously born to Abraham (100 years old) and Sarah (90 years old), demonstrating God's power to fulfill His word against all odds.
~1760 BC
Binding of Isaac
God tests Abraham by commanding him to sacrifice Isaac. Abraham's willingness to obey, trusting God to raise Isaac from the dead if necessary, further displays his profound faith.
c. 1400 BC
Exodus from Egypt
The descendants of Abraham, now a multitude, are miraculously delivered from slavery in Egypt, fulfilling the promise of numerous descendants and establishing them as a nation.
c. 1000 BC
Davidic Kingdom Established
David establishes a lasting kingdom in Jerusalem, a key aspect of God's promises to Abraham regarding land and a lineage that would rule.
586 BC
Fall of Jerusalem
The Babylonians destroy Jerusalem and its temple, exiling many Israelites. This event challenges the promises of land and God's presence among His people, requiring deep faith to trust God's faithfulness.
This passage shows God directly responding to Abraham's implied doubt with the question, 'Is anything too hard for the Lord?', directly echoing the conviction found in Romans 4:21.
Hebrews 11:11This verse highlights Sarah's faith in God's faithfulness to conceive Isaac, demonstrating that the conviction in God's ability to fulfill His promises extended to Abraham's wife as well.
Luke 1:37Similar to Abraham's conviction about Isaac, this verse declares 'For with God nothing shall be impossible,' underscoring the theme of God's omnipotence in fulfilling His promises, even in miraculous ways.
John 11:40Jesus tells Martha 'Did I not tell you that if you believed you would see the glory of God?', connecting belief in God's power to perform His promises with the manifestation of His glory, a concept central to Abraham's faith.
Jeremiah 32:17The prophet Jeremiah exclaims, 'Ah, Lord GOD! Behold, you have made the heavens and the earth by your great power and by your outstretched arm. Nothing is too hard for you!', reinforcing the absolute power of God that Abraham trusted in.
henryRomans 4:13-22: "For the promise, that he should be the heir of the world, was not to Abraham, or to his seed, through the law, but through the righteousness of faith."
4:13-22 The promise was made to Abraham long before the law. It points at Christ, and it refers to the promise, Ge 12:3. In Thee shall all families of the earth be blessed. The law worketh wrath, by showing that every transgressor is exposed to the Divine displeasure. As God intended to give men a title to the promised blessings…
clarkeRomans 4:21: "And being fully persuaded that, what he had promised, he was able also to perform."
And being fully persuaded - πληροφορηθεις, his measure: his soul was full of confidence, that the truth of God bound him to fulfill his promise and his power enabled him to do it.
Abraham's profound faith wasn't just believing God would do what He promised, but deeply trusting that God possessed the absolute ability to do it, regardless of any humanly impossible circumstances. This conviction, that God's power was sufficient beyond all doubt, is what honored God and demonstrated the true nature of Abraham's righteousness.
Paul is explaining how Abraham was declared righteous not by following the law, but by his faith. This faith allowed him to believe God's promises even when they seemed impossible, like having a child in his old age, fully trusting God's power to make it happen. This is presented as the model for how all believers, Jewish and Gentile, are justified by faith in God's power to bring about His promises.
Paul is explaining how Abraham was declared righteous not by following the law, but by his faith. This faith allowed him to believe God's promises even when they seemed impossible, like having a child in his old age, fully trusting God's power to make it happen. This is presented as the model for how all believers, Jewish and Gentile, are justified by faith in God's power to bring about His promises.
"fully convinced that God was able to do what he had promised." — Abraham's profound faith wasn't just believing God would do what He promised, but deeply trusting that God possessed the absolute ability to do it, regardless of any humanly impossible circumstan…
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Last reviewed October 2026