Theological term
Unpardonable Sin
5 sermons · All terms
Ask FGBC #39: What Does The Bible Mean By The Unforgiveable Sin?
What is the unforgivable sin, and should a troubled conscience fear having committed it? Drawing on Matthew 12:31-32 and the apostasy warnings of Hebrews 6 and 10, this Q&A response argues that blasphemy against the Holy Spirit is not a momentary verbal offense but a wholesale, persistent rejection of the redemptive work of God in Christ — impugning the Spirit's testimony to Christ's works and glory. The defining mark of a genuine apostate is not anguish or doubt but a hardened, unrepentant contempt, like those who cried 'crucify him.' Anyone asking whether they have committed this sin gives evidence by that very asking that they have not.
The Identity of the Good Shepherd
John 10:22–30 records the climactic confrontation in Solomon's Porch during the Feast of Dedication, where Jesus answers the persistent demand to declare his identity plainly. He does so not with new information but by pressing what he has already said — through his works, his doctrine, and his relation to the Father — culminating in the declaration 'I and my Father are one,' a statement the unbelieving Jews rightly understood as a claim to full divine essence. The sermon traces five movements in verses 25–30: the declaration, confirmation, rejection, recognition, and affirmation that Jesus is the Christ, with extended treatment of the sovereignty of God in salvation, the security of the sheep grounded in both the Son and the Father, and the ontological unity of Father and Son against both Arian and Sabellian error. Believers are called to rest in the particular, efficacious, and irrevocable redemption accomplished by the Good Shepherd, and those outside Christ are called to hear his voice and believe.
The Warning Against Apostasy
Hebrews 10:26–31 contains one of the New Testament's starkest warnings, and the question it raises is precise: who has committed the sin of willful apostasy, and can it be the believer who struggles with remaining corruption? This sermon works through the nature and judgment of apostasy, distinguishing between the sensitive saint who sorrows over indwelling sin and the apostate who openly tramples the Son of God underfoot, counts the blood of the covenant a common thing, and insults the Spirit of grace. Drawing on Calvin, Owen, Gill, and Ursinus, the sermon argues that the persons in view are not struggling believers but outright rejecters of the gospel — in the original context, Hebrew Christians who publicly renounced Christ to return to the Levitical system. The chief comfort the passage affords is precisely this: the believer who fears he has committed the unpardonable sin almost certainly has not, and is called to draw near, hold fast, and consider one another in the confidence of a once-for-all sacrifice that saves to the uttermost.
The Warning Against Apostasy
Hebrews 10:26–31 is one of the most pastorally misread warning passages in the New Testament, and this expository sermon works carefully to distinguish the sin of apostasy from the ordinary, ongoing sin of weak believers. The apostate is not a struggling saint who confesses and seeks mercy; he is one who, having made an outward profession of faith, openly and obstinately repudiates Christ — trampling the Son of God underfoot, counting the blood of the covenant a common thing, and insulting the Spirit of grace. The sermon draws on Owen, Calvin, Gill, and Ursinus to establish that apostasy is a total, willful renunciation of the gospel, not any species of sin for which Christ has made atonement. Believers burdened by remaining corruption are urged to distinguish themselves from apostates by the very instinct that drives them to the throne of grace — and to make full use of the means of grace God has appointed to preserve them from the apostasy the passage warns against.
The Blind, the Possessed, and Division over Christ
Matthew 9:27–34 closes the extended miracle section of Matthew 8–9 with two final healings — two blind men receiving sight and a mute, demon-possessed man restored to speech — followed by the starkest division yet between those who marvel and those who blaspheme. The blind men's cry of 'Son of David' identifies Jesus as the Davidic Messiah promised in the covenant of 2 Samuel 7 and foretold in Isaiah 35, while their faith — persistent, humble, and cast entirely on Christ's mercy — provides a concrete portrait of what saving trust looks like. The Pharisees, unable to deny the miracles, attribute them to Beelzebub, a wickedness that anticipates the unpardonable sin of Matthew 12 and the intensifying opposition that will carry Jesus to the cross. The sermon calls every hearer to reckon with the unavoidable division: there is no neutrality before Christ — one either marvels and believes, or blasphemes and rejects.