Regeneration Takes Repentance

The act of justification cannot happen without one coming to the realization of their sin and asking for forgiveness and repenting for that in-which their sin has offended God. Calvin writes on this matter saying,

It is proper to consider what the dreadful iniquity is which is not to be pardoned. The definition which Augustine somewhere gives—viz. that it is obstinate perverseness, with distrust of pardon, continued till death,—scarcely agrees with the words of Christ, that it shall not be forgiven in this world. For either this is said in vain, or it may be committed in this world. But if Augustine’s definition is correct, the sin is not committed unless persisted in till death. Others say, that the sin against the Holy Spirit consists in envying the grace conferred upon a brother; but I know not on what it is founded. Here, however, let us give the true definition, which, when once it is established by sound evidence, will easily of itself overturn all the others. I say therefore that he sins against the Holy Spirit who, while so constrained by the power of divine truth that he cannot plead ignorance, yet deliberately resists, and that merely for the sake of resisting. For Christ, in explanation of what he had said, immediately adds, “Whosoever speaketh a word against the Son of man, it shall be forgiven him; but whosoever speaketh against the holy Ghost, it shall not be forgiven him,” (Mt. 12:31). And Matthew uses the term spirit of blasphemy for blasphemy against the Spirit. How can any one insult the Son, without at the same time attacking the Spirit? In this way. Those who in ignorance assail the unknown truth of God, and yet are so disposed that they would be unwilling to extinguish the truth of God when manifested to them, or utter one word against him whom they knew to be the Lord’s Anointed, sin against the Father and the Son. Thus there are many in the present day who have the greatest abhorrence to the doctrine of the Gospel, and yet, if they knew it to be the doctrine of the Gospel, would be prepared to venerate it with their whole heart. But those who are convinced in conscience that what they repudiate and impugn is the word of God, and yet cease not to impugn it, are said to blaspheme against the Spirit, inasmuch as they struggle against the illumination which is the work of the Spirit. Such were some of the Jews, who, when they could not resist the Spirit speaking by Stephen, yet were bent on resisting (Acts 6:10). There can be no doubt that many of them were carried away by zeal for the law; but it appears that there were others who maliciously and impiously raged against God himself, that is, against the doctrine which they knew to be of God. Such, too, were the Pharisees, on whom our Lord denounced woe. To depreciate the power of the Holy Spirit, they defamed him by the name of Beelzebub (Mt. 9:3, 4; 12:24). The spirit of blasphemy, therefore, is, when a man audaciously, and of set purpose, rushes forth to insult his divine name. This Paul intimates when he says, “but I obtained mercy, because I did it ignorantly in unbelief;” otherwise he had deservedly been held unworthy of the grace of God. If ignorance joined with unbelief made him obtain pardon, it follows, that there is no room for pardon when knowledge is added to unbelief.

Institutes 3.3.22