What is wilful sin, and what does Hebrews 10:26 mean for believers?
Question 06063
There is a difference between a person who stumbles into sin through weakness or momentary failure of judgement, and a person who looks at what they know to be wrong and chooses it anyway, with full awareness and deliberate intent. Scripture recognises this distinction, and Hebrews 10:26 addresses it in terms that have unsettled thoughtful Christians across the centuries: “For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins.” What is wilful sin, and what does that warning actually mean?
The Biblical Category
The Old Testament already recognised a distinction between unintentional sin and presumptuous or defiant sin. Numbers 15 distinguishes between sins committed “unintentionally” — by accident, through ignorance, or through weakness — and the sin committed “with a high hand” (Numbers 15:30). The phrase is striking: it pictures a person raising their fist toward God, sinning in open defiance. Under the Mosaic covenant, the provision available for unintentional sin was not available for this category. The person was to be “cut off from among his people” (Numbers 15:30).
The contrast runs through the Psalms as well. Psalm 19:13 distinguishes between “hidden faults” — unperceived failures — and “presumptuous sins,” asking for preservation from the latter so that the psalmist would not be enslaved to them. Willingness and deliberateness are the distinguishing marks. The wilful sin is not a sin of weakness overcome by temptation but a sin of cold choice. James 4:17 extends this principle to sins of omission: “Whoever knows the right thing to do and fails to do it, for him it is sin.” Knowledge before God creates moral responsibility, and the deliberate setting aside of what is known to be right is wilful sin regardless of whether it involves an overtly transgressive act.
Hebrews 10:26 and Its Context
Hebrews 10:26 requires careful contextual reading rather than isolated quotation. The letter addresses Jewish believers under pressure to abandon their Christian confession and return to the Mosaic system. The warning is specifically against deliberate apostasy — the decision to renounce Christ and return to a system of animal sacrifice that has been superseded and fulfilled — not against any and every deliberate sin a believer might commit. The phrase “after receiving the knowledge of the truth” positions this as a post-conversion, post-understanding decision to reject what has been clearly known and believed.
The logic is specific to the argument of Hebrews: if a person knowingly turns away from Christ’s sacrifice as sufficient and final, and deliberately returns to a system that has been fulfilled and closed, there is nowhere else to go. The sacrifice of Christ is the only ground on which forgiveness is available. To renounce it deliberately is to cut oneself off from the only provision that exists. This is not a general statement that any deliberate sin by a Christian automatically forfeits salvation. Verse 29 clarifies the nature of the sin in view: “one who has trampled underfoot the Son of God, and has profaned the blood of the covenant by which he was sanctified, and has outraged the Spirit of grace.” This is apostasy, not the believer’s struggle with sin.
Wilful Sin and the Believer
This contextual reading does not mean that deliberate sin in a believer is a minor matter. The distinction between wilful and unintentional sin is real and spiritually significant. A Christian who commits sin through weakness, overwhelmed by temptation beyond their present capacity to resist, is in a different position from a Christian who coldly calculates a sinful course of action and pursues it without remorse. The latter represents a more serious breakdown in fellowship with God, a harder conscience, and a greater resistance to the Spirit’s work. The pattern of deliberate, premeditated sinning combined with an absence of genuine grief is a more alarming spiritual symptom than the painful, repentant struggle with sin that characterises much of the Christian life.
So, now what?
The existence of this category in Scripture is not meant to produce paralysing anxiety in the believer who has sinned with some degree of deliberateness. The invitation of 1 John 1:9 and the great high-priestly ministry of Christ (Hebrews 4:14-16) remain available. The warning is directed at a settled pattern of deliberate rejection — particularly apostasy — not at the individual who has sinned wilfully and comes back with genuine repentance. David’s sin with Bathsheba was premeditated and deliberate, involving both adultery and murder. His restoration in Psalm 51 demonstrates that even grievous, wilful sin is not beyond the reach of genuine repentance and divine forgiveness. The question Hebrews 10:26 presses is not “have you ever sinned deliberately?” but “are you deliberately and finally turning away from Christ Himself?”
“If we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins.” Hebrews 10:26
