What does God's oath reveal about Him?
What does "I have sworn by My holiness" reveal about God's character?

Where the Phrase Appears

Psalm 89:35 – “Once for all I have sworn by My holiness— I will not lie to David.”

Amos 4:2 – “The Lord GOD has sworn by His holiness…”


Why God Swears at All

Hebrews 6:13 – With no one greater to swear by, God swears by Himself.

Hebrews 6:17-18 – He does this to show “the unchangeable nature of His purpose” so that we might have “strong encouragement.”


Holiness in Scripture

Isaiah 6:3 – “Holy, holy, holy is the LORD of Hosts.”

1 Samuel 2:2 – “There is none holy like the LORD.”

• God’s holiness is His absolute moral purity, total separation from sin, and perfect commitment to His own glory.


What “I Have Sworn by My Holiness” Reveals about God

• He is utterly truthful

Numbers 23:19 – “God is not a man, that He should lie.”

• He is unchangeably consistent

Malachi 3:6 – “For I, the LORD, do not change.”

• His character guarantees His promises

Psalm 89:34 – “I will not violate My covenant.”

• His holiness is the highest possible standard

– Nothing is greater; therefore His oath is absolutely secure.

• Judgment and mercy both flow from the same holy nature

Psalm 89:30-33 shows discipline for sin, yet unwavering covenant love.

• Covenant faithfulness is rooted in holiness

2 Samuel 7:12-16 links the Davidic covenant to the Messiah; God’s holy oath secures it.


The Weight of an Oath by Holiness

• Unbreakable commitment

• Cosmic accountability—He binds Himself before creation

• Assurance for believers that every promise in Christ will stand (2 Corinthians 1:20)

• Warning to rebels—holiness guarantees just judgment (Amos 4:2)


Practical Take-Aways

• Confidence: God’s promises rest on His holy nature, not on our performance.

• Reverence: Approach Him with awe; His holiness is not casual.

• Stability: When circumstances shift, His sworn word remains fixed (Psalm 119:89).

• Urgency: Because His holiness ensures judgment, now is the time to walk in repentance and faith (Acts 17:30-31).

How does Psalm 89:35 emphasize God's faithfulness to His promises?
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