Theological Significance of God's Omniscience in Scripture
The Hebrew Scriptures declare that God's knowledge extends to all things without limitation: "Great is our Lord, and of great power: his understanding is infinite" (Psalm 147:5) [1]. This attribute—God's omniscience—stands as one of the foundational perfections ascribed to the divine nature throughout Scripture, shaping how believers understand providence, prayer, judgment, and the very possibility of relationship with the Creator.
Biblical Foundation and Scope
Scripture presents God's knowledge as qualitatively different from human cognition. The text describes it as "perfect" (Job 36:4; 37:16), "universal" (Job 28:24; Daniel 2:22; Acts 15:18), and "infinite" (Psalm 147:5; Romans 11:33) [1]. This knowledge encompasses not merely present realities but extends to all temporal dimensions. Acts 2:23, Romans 8:29, 11:2, and 1 Peter 1:2 reference God's foreknowledge, an attribute whose "full import we cannot comprehend" yet which Scripture affirms "in the most absolute sense" as infinite [2]. The prophetic literature demonstrates this: God knows what would have occurred under different circumstances (1 Samuel 23:9-13; Jeremiah 38:17-23; 42:9-22) and what responses would have followed different historical conditions (Matthew 11:21, 23) [2].
The wisdom literature particularly emphasizes the incomprehensibility of divine knowledge. Job 36:4 and 37:16 describe God's knowledge as perfect, while Psalm 139:6 declares it "wonderful" and "beyond human comprehension" [1]. Isaiah 40:28 and Romans 11:33 characterize it as "unsearchable," and Isaiah 44:7 and Jeremiah 10:7 present it as "incomparable" [1]. Critically, Scripture insists this knowledge is "underived"—God has no teacher, no source from which he learns (Job 21:22; Isaiah 40:14) [1]. All human wisdom, by contrast, originates from God (Daniel 2:1), and even the wisdom of the saints derives from him (Ezra 7:25) [1].
The Witness of Psalm 139
Nonconformist interpretation identifies Psalm 139 as the premier biblical meditation on omniscience, with some Jewish scholars considering it "the most excellent of all the psalms of David" [6]. The psalm structures its argument carefully: it first asserts the doctrine (verses 1-6), then confirms it through two supporting arguments—God's omnipresence (verses 7-12) and his role as Creator (verses 13-16)—before drawing practical inferences [6].
The connection between omnipresence and omniscience proves essential to the psalm's logic. "If God is omnipresent, he must needs be omniscient," because the Creator who "fills both" heaven and earth must necessarily perceive all that occurs within his presence [11]. The psalmist asks, "Whither shall I go from thy spirit? or whither shall I flee from thy presence?" (Psalm 139:7), establishing that no spatial location—neither heaven, Sheol, nor the uttermost parts of the sea—removes one from God's awareness [11]. This universal presence grounds universal knowledge.
The psalm's second argument proceeds from creation: God who "made us, therefore he knows us" [6]. The intimate knowledge of the psalmist's formation in the womb (verses 13-16) demonstrates that divine omniscience extends to the most hidden processes of human development. This knowledge is not merely retrospective but prospective: God's "book" contained all the psalmist's days "when as yet there was none of them" (verse 16).
Theological Implications for Divine Decrees
The doctrine of omniscience connects directly to Reformed articulations of divine decrees. God's "eternal, unchangeable, holy, wise, and sovereign purpose" comprehends "at once all things that ever were or will be in their causes, conditions, successions, and relations, and determining their certain futurition" [3]. This comprehensive knowledge precedes and grounds the decree itself—God does not learn outcomes after willing them but wills with complete foreknowledge of all consequences.
The decree proceeds from "an infinite, absolute, eternal, unchangeable, and sovereign Person" [3], and omniscience ensures that no contingency surprises God, no development requires adjustment. The "manifold wisdom of God" displayed to principalities and powers through the church (Ephesians 3:10) [4] reflects not merely power but the intricate knowledge that coordinates redemptive history across ages and among countless individuals.
Pastoral and Devotional Application
Psalm 139 models how believers should respond to omniscience. Rather than terror at exposure, the psalmist expresses wonder and gratitude: "How precious also are thy thoughts unto me, O God!" (verse 17) [7]. God's omniscience, "which might justly have watched over us to do us hurt, has been employed for us, and has watched over us to do us good" (Jeremiah 31:28) [7]. The divine thoughts toward the believer are "thoughts of love, thoughts of good, and not of evil" (Jeremiah 29:11) [7].
This transforms omniscience from a doctrine of judgment into one of comfort. The "eyes of the Lord" that are "in every place" (Proverbs 15:3) express not only his omniscience but his providence, reaching "to places most distant and secret" with care for his people [8]. The same knowledge that sees sin also sees need, distress, and the hidden faithfulness of the heart.
Christological Concentration
The New Testament locates omniscience christologically. All things are "open and manifest" to Christ the essential Word (Hebrews 4:13) [8], and "all the fulness" of divine excellence—including perfect knowledge—dwells in him bodily (Colossians 1:19; 2:9) [10]. The Johannine literature emphasizes that the Father has given the Son authority "over all flesh" (John 17:2) and "over all things" (John 3:35; Ephesians 1:22) [5], which presupposes comprehensive knowledge of all under his governance. The Son's creative role (John 1:3, 10; Colossians 1:16) and his sustaining of all things (Colossians 1:17; Hebrews 1:3) [5] require exhaustive knowledge of creation's structure and needs.
The ascription of glory "to the only wise God through Jesus Christ" (Romans 16:27) [9] acknowledges that divine wisdom—inseparable from omniscience—operates redemptively through the Son. The gospel itself "contains treasures" of this wisdom (1 Corinthians 2:7) [1], revealing what God knew and planned before the foundation of the world.
Sources
- Torrey's Topical Textbook “Torrey's Topical Textbook: Wisdom of God, The — Is one of his attributes -- 1Sa 2:3; Job 9:4. Described as Perfect. -- Job 36:4; 37:16. Mighty. -- Job 36:5. Universal. -- Job 28:24; Da 2:22; Ac 15:18. Infinite. -- Ps 147:5; Ro 11:33. Unsearchable. -- Isa 40:28; Ro 11:33. Wonderful. -- Ps 139:6. Beyond human comprehension. -- Ps 139:6. Incomparable. -- Isa 44:7; Jer 10:7. Underived. -- Job 21:22; Isa 40:14. The gospel contains treasures of -- 1Co 2:7. Wisdom of saints is derived from -- Ezr 7:25. All human wisdom derived from -- Da 2:1. Saints ascribe to him -- Da 2:20. Exhibited in His works. ”
- Easton's Bible Dictionary “Easton's Bible Dictionary: Foreknowledge of God — Acts 2:23; Rom. 8:29; 11:2; 1 Pet. 1:2), one of those high attributes essentially appertaining to him the full import of which we cannot comprehend. In the most absolute sense his knowledge is infinite (1 Sam. 23:9-13; Jer. 38:17-23; 42:9-22, Matt. 11:21, 23; Acts 15:18).”
- Easton's Bible Dictionary “Easton's Bible Dictionary: Decrees of God — "The decrees of God are his eternal, unchangeable, holy, wise, and sovereign purpose, comprehending at once all things that ever were or will be in their causes, conditions, successions, and relations, and determining their certain futurition. The several contents of this one eternal purpose are, because of the limitation of our faculties, necessarily conceived of by us in partial aspects, and in logical relations, and are therefore styled Decrees." The decree being the act of an infinite, absolute, eternal, unchangeable, and sovereign Person, compre”
- Ephesians “Ephesians 3:10 (Geneva1599) — To the intent, that nowe vnto principalities and powers in heauenly places, might be knowen by the Church the manifolde wisedome of God,”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Power of Christ, The — As the Son of God, is the power of God -- Joh 5:17-19; 10:28-30. As man, is from the Father -- Ac 10:38. Described as Supreme. -- Eph 1:20,21; 1Pe 3:22. Unlimited. -- Mt 28:18. Over all flesh. -- Joh 17:2. Over all things. -- Joh 3:35; Eph 1:22. Glorious. -- 2Th 1:9. Everlasting. -- 1Ti 6:16. Is able to subdue all things -- Php 3:21. Exhibited in Creation. -- Joh 1:3,10; Col 1:16. Upholding all things. -- Col 1:17; Heb 1:3. Salvation. -- Isa 63:1; Heb 7:25. His teaching. -- Mt 7:28,29; Lu 4:32. Working miracles. -- Mt 8:27; Lu 5:17. Enabling ot”
- Psalms (Nonconformist/Puritan) “Matthew Henry on Psalms 139 (introduction): Some of the Jewish doctors are of opinion that this is the most excellent of all the psalms of David; and a very pious devout meditation it is upon the doctrine of God's omniscience, which we should therefore have our hearts fixed upon and filled with in singing this psalm. I. This doctrine is here asserted, and fully laid down (Psa 139:1-6). II. It is confirmed by two arguments: - 1. God is every where present; therefore he knows all (Psa 139:7-12). 2. He made us, therefore he knows us (Psa 139:13-16). III. Some inferences are drawn from this doctri”
- Psalms (Nonconformist/Puritan) “Matthew Henry on Psalms 139:17: Here the psalmist makes application of the doctrine of God's omniscience, divers ways. I. He acknowledges, with wonder and thankfulness, the care God had taken of him all his days, Psa 139:17, Psa 139:18. God, who knew him, thought of him, and his thoughts towards him were thoughts of love, thought of good, and not of evil, Jer 29:11. God's omniscience, which might justly have watched over us to do us hurt, has been employed for us, and has watched over us to do us good, Jer 31:28. God's counsels concerning us and our welfare have been, 1. Precious to admiration”
- Proverbs (Baptist/Reformed) “John Gill on Proverbs 15:3: The eyes of the Lord are in every place,.... Which are expressive of his omniscience, of the full, clear, distinct, and perfect knowledge, which he has of all creatures and things; so that nothing is hid from him, but all open and manifest to him; as they are to Christ the essential Word, Heb 4:13; and also of the providence of God with respect to all persons in general, and to his own people in particular; and as he is infinite and immense, omnipresent and in all places of the world, so his omniscience and providence reach everywhere, to places most distant and sec”
- Romans (Presbyterian) “Jamieson, Fausset & Brown on Romans 16:27: To God, &c.--"To the only wise God through Jesus Christ, be"--literally, "to whom be"; that is, "to Him, I say, be the glory for ever. Amen." At its outset, this is an ascription of glory to the power that could do all this; at its close it ascribes glory to the wisdom that planned and that presides over the gathering of a redeemed people out of all nations. The apostle adds his devout "Amen," which the reader--if he has followed him with the astonishment and delight of him who pens these words--will fervently echo. On this concluding section of the ”
- Colossians (Presbyterian) “Jamieson, Fausset & Brown on Colossians 1:19: Greek, "(God) was well pleased," &c. in him--that is, in the Son (Mat 3:17). all fulness--rather as Greek, "all the fulness," namely, of God, whatever divine excellence is in God the Father (Col 2:9; Eph 3:19; compare Joh 1:16; Joh 3:34). The Gnostics used the term "fulness," for the assemblage of emanations, or angelic powers, coming from God. The Spirit presciently by Paul warns the Church, that the true "fulness" dwells in Christ alone. This assigns the reason why Christ takes precedence of every creature (Col 1:15). For two reasons Christ i”
- Psalms (Nonconformist/Puritan) “Matthew Henry on Psalms 139:7: It is of great use to us to know the certainty of the things wherein we have been instructed, that we may not only believe them, but be able to tell why we believe them, and to give a reason of the hope that is in us. David is sure that God perfectly knows him and all his ways, I. Because he is always under his eye. If God is omnipresent, he must needs be omniscient; but he is omnipresent; this supposes the infinite and immensity of his being, from which follows the ubiquity of his presence; heaven and earth include the whole creation, and the Creator fills both ”