Galatians 3:15: God's word reliable?
What does Galatians 3:15 teach about the reliability of God's word today?

Setting the Scene in Galatians 3:15

“Brothers, let me put this in human terms. Even a human covenant, once it is ratified, cannot be canceled or amended.” (Galatians 3:15)


The Legal Illustration—and What It Means About God’s Word

• Paul points to an everyday practice: legal contracts signed by mere humans stay fixed.

• His logic: if flawed people keep their word once it is sealed, the flawless God must keep His Word without exception.

• The verse assumes the Bible’s promises are not only true but unchangeable, underscoring a literal, final authority that cannot be altered or revoked.


Old Covenant Versus Human Contracts: Why God’s Promises Stand

• God’s covenant with Abraham (Genesis 12:1-3; 15:5-6) predates the Law by 430 years (Galatians 3:17).

• That Law never annulled or replaced the earlier promise; it highlighted humankind’s need and pointed to Christ.

• Because the promise rested on God alone, it remains as steady today as the moment He spoke it.


Other Scriptures Confirming God’s Unchangeable Word

Numbers 23:19 — “God is not a man, that He should lie… Has He spoken, and will He not fulfill it?”

Isaiah 55:11 — God’s word “will not return to Me empty, but will accomplish what I please.”

Psalm 119:89 — “Your word, O LORD, is everlasting; it is firmly fixed in the heavens.”

Matthew 24:35 — “Heaven and earth will pass away, but My words will never pass away.”

Hebrews 6:17-18 — God’s oath is “unchangeable,” so “it is impossible for God to lie.”

2 Corinthians 1:20 — “For all the promises of God are ‘Yes’ in Christ.”


What This Means for Us Today

• Salvation: The promise that “everyone who calls on the name of the Lord will be saved” (Romans 10:13) is as binding now as when first spoken.

• Guidance: Every command and principle in Scripture still carries divine authority; no new cultural context can revoke it.

• Assurance: Because God cannot and will not amend His Word, believers rest secure in His forgiveness, adoption, and future hope.

• Stability: In a culture that shifts daily, Scripture stands as the unmoving reference point for truth and morality.


Practical Takeaways for Daily Confidence

• Read with expectation—each promise is guaranteed by God’s character.

• Obey with courage—no command will be overturned by later revelation or modern opinion.

• Pray with faith—ground requests in verses that reveal God’s unbreakable will.

• Stand firm in trials—anchor hope in Scriptures that cannot be canceled or amended.

How can we apply the concept of unchangeable promises in our daily faith?
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