
Light + Truth The Cross Proves God Is Just
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Jan 16, 2026 In this engaging discussion, John Piper, an influential Reformed theologian and founder of Desiring God, explores the profound implications of Christ's death on God's justice. Piper addresses tough questions about forgiveness and justice, revealing how the cross allows God to uphold fairness while offering mercy. He shares convicting insights from Romans and Isaiah, illustrating how Jesus' sacrifice secures God's righteousness. This thought-provoking conversation emphasizes the beauty of substitutionary atonement, bringing comfort to believers wrestling with sin.
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Prisoners Stunned By ‘His Father Killed Him’
- John Piper recounts John Armstrong asking prisoners who killed Jesus, then saying, 'Wrong. His father killed him.'
- The prisoners were stunned because many had abusive fathers and couldn't imagine a loving Father doing that.
Vigil Image: 'He Bore Your Transgressions'
- Piper imagines a dying friend's vigil and would want repeated assurance: 'He bore your transgressions.'
- He uses this image to emphasize the comforting centrality of substitutionary atonement.
Forgiveness Raises A Justice Problem
- Forgiving sinners appears to conflict with justice and can be read as impeaching God (Proverbs 17:15 vs. Romans 4–5).
- Piper insists Paul's main challenge is explaining how God can pass over sins without compromising holiness.

















