1 John 5:16

But what presses harder upon the present question is that saying of the apostle John, "If any man know that his brother sinneth a sin not unto death, he shall ask, and the Lord will give life to that man who sinneth not unto death: but there is a sin unto death: not for that do I say that he should ask." For it manifestly shows that there are some "brethren" whom we are not commanded to pray for, whereas the Lord bids us pray even for our persecutors. Nor can this question be solved except we acknowledge, that there are some sins in brethren that are worse than the sin of enemies in persecuting.

The "sin," therefore, of a brother, "unto death," I suppose to be when, after the acknowledging of God through the grace of our Lord Jesus Christ, one fights against the brotherhood, and is set on by the fire-brands of hatred against the very grace through which he was reconciled to God. But "a sin not unto death" is when a person, not having alienated his love from his brother, yet through some infirmity of mind may have failed to exhibit the due offices of brotherhood. Wherefore, on the one hand, the Lord on the cross said, "Father, forgive them, for they know not what they do," since they had not yet, by being made partakers of the grace of the Holy Spirit, entered into the fellowship of holy brotherhood; and blessed Stephen in the Acts of the Apostles prays for them who are stoning him; because they had not yet believed Christ, and were not fighting against that grace of communion. On the other hand, the apostle Paul does not pray for Alexander, and the reason I suppose, is, that this man was a brother, and had sinned "unto death," i.e. by opposing the brotherhood in a spirit of hatred. Whereas for such as had not broken off the bonds of love, but had given way through fear, he prays that they may be forgiven. For so he says: "Alexander the coppersmith did me much evil: the Lord reward him according to his works: of whom be thou ware also; for he hath greatly withstood our words." Then he subjoins for whom he prays, saying, "At my first answer no man stood with me, but all men forsook me: I pray God that it may not be laid to their charge."

This difference of sins it is that distinguishes Judas with his treason from Peter with his denial. Not that to him who repenteth there is to be no forgiveness: lest we go against that sentence of the Lord, in which He commands always to forgive the brother who asks his brother's forgiveness: but that the mischief of that sin is, that the man cannot submit to the humiliation of begging for pardon, even when he is forced by his evil conscience both to acknowledge and to publish his sin. For when Judas had said, "I have sinned, in that I have betrayed the innocent blood," he went and hanged himself in desperation, rather than pray for forgiveness in humiliation. Wherefore it makes a great difference, what sort of repentance God forgives. For many are much quicker than others to confess that they have sinned, and are angry with themselves in such sort that they vehemently wish they had not sinned, while yet they cannot lay down their pride, and submit to have the heart humbled and broken so as to implore pardon: a state of mind which one may well believe to be, for the greatness of their sin, a part of their already begun damnation.

And this, perhaps, it is "to sin against the Holy Ghost:" i.e. through malice and envy to fight against brotherly charity after receiving the grace of the Holy Spirit: that sin which the Lord saith hath no forgiveness, either here or in the world to come. For the Lord in saying to the Pharisees, "Whosoever shall speak an evil word against the Son of Man," may have meant to warn them to come to the grace of God, and having received it, not to sin as they have now sinned. For now they have spoken an evil word against the Son of Man, and it may be forgiven them, if they be converted and believe and receive the Holy Spirit: which when they have received, if they will then have ill-will against the brotherhood and oppose the grace they have received, there is no forgiveness for them, either in this world or in the world to come.

By this grace such is the liberty they receive, that although as long as they live here they have to fight against the lusts of sins, and are overtaken by some sins for which they must daily pray, "Forgive us our debts," yet they no longer serve the sin which is unto death, of which the apostle John saith, "There is a sin unto death, I do not say that he shall ask for that." Concerning which sin (since it is not expressed) many different opinions may be formed: but I affirm that sin to be the forsaking until death the "faith which worketh by love."