Why does God seem different in the Old and New Testaments?
Question 2061
Few questions surface more persistently in pastoral conversations than this one: why does the God of the Old Testament seem harsh and demanding, while Jesus appears gentle and compassionate? The apparent contrast unsettles sincere believers and provides a ready objection for sceptics. But the contrast, once examined carefully, tells us more about how we read Scripture than about any genuine inconsistency in God himself.
The God of the Old Testament Revisited
The assumption behind this question is that the Old Testament presents a God of wrath while the New Testament presents a God of love. That is a caricature that does not survive sustained reading of either Testament. The Old Testament is saturated with divine tenderness. Hosea records God saying of wayward Israel: “How can I give you up, O Ephraim? How can I hand you over, O Israel? My heart recoils within me; my compassion grows warm and tender” (Hosea 11:8). In Jeremiah, God declares: “I have loved you with an everlasting love; therefore I have continued my faithfulness to you” (Jeremiah 31:3). The Psalms are full of the language of refuge, compassion, and steadfast love. The Hebrew hesed, covenant faithfulness, appears hundreds of times across the Old Testament.
The New Testament is equally not without divine severity. Jesus speaks of hell more than any other figure in Scripture. The book of Revelation depicts judgement on a scale that dwarfs anything in the Old Testament. Romans 1 describes God’s wrath being revealed from heaven against all ungodliness. The writer to the Hebrews quotes the Old Testament directly: “It is a fearful thing to fall into the hands of the living God” (Hebrews 10:31). Both Testaments present the same God, whose character combines absolute holiness and genuine love without contradiction.
Progressive Revelation
Part of what creates the impression of difference is that God’s self-revelation is progressive. Hebrews 1:1-2 states this explicitly: “Long ago, at many times and in many ways, God spoke to our fathers by the prophets, but in these last days he has spoken to us by his Son.” The Old Testament is not a lesser or cruder revelation that the New Testament corrects; it is an earlier stage of the same unfolding disclosure, pointing forward to its own fulfilment. The person who reads Genesis expecting the same clarity about the nature of God as is available in John’s Gospel has misunderstood how the canon works.
Jesus himself is the fullest revelation of God’s character. John 1:18 states: “No one has ever seen God; the only God, who is at the Father’s side, he has made him known.” The word translated “made him known” is exegesato: to expound, to explain, to exegete. Jesus exegetes the Father. The Old Testament is not wrong about God; Jesus fills in what could not yet be seen with the same clarity.
The God Who Does Not Change
Whatever differences of tone we detect between the Testaments, one thing is non-negotiable: God himself does not change. Malachi 3:6 records: “For I the LORD do not change; therefore you, O children of Jacob, are not consumed.” James 1:17 describes God as “the Father of lights, with whom there is no variation or shadow due to change.” The being and character of God are not subject to development or revision across the canon. His justice, his mercy, his love, and his holiness are constant. What changes is the depth and clarity with which they are revealed.
The Old Testament sacrificial system was not God at his harshest before Jesus softened him. It was God providing, in his mercy, a way for a sinful people to approach a holy God, foreshadowing the definitive sacrifice to come. The judgements recorded in the Old Testament were not capricious; they were the outworking of the same moral character that makes the cross necessary. The same God who commanded the destruction of Canaan is the same God whose Son bore divine wrath at Calvary. Both are expressions of absolute holiness encountering human sin.
What We Bring to the Text
Much of the perceived difference comes from selective reading. Those who find the Old Testament God harsh have often not read the passages of extraordinary tenderness in the prophets. Those who find the New Testament God gentle have often not engaged seriously with Jesus’ extended descriptions of judgement in Matthew 25, or with the imagery of Revelation 19. The canon must be read whole, and when it is, the picture that emerges is not of two different deities but of one God whose character is consistent even as the revelation of that character deepens toward its fullest expression in Jesus Christ.
So, now what?
The God who reveals himself across all sixty-six books is not a problem to be solved but a Person to be known. Reading the Old Testament through Jesus, and reading Jesus in the light of the whole Old Testament, produces a richer and more accurate understanding of God than either Testament read in isolation. When God’s character seems harsh or difficult, the question to press is not “is this really God?” but “what does this reveal about who God is?” The answer, consistently, is that he is both more holy and more merciful than we naturally imagine.
“No one has ever seen God; the only God, who is at the Father’s side, he has made him known.” John 1:18
