But when God accomplishes His good pleasure in the elect, or works in them true conversion, He not only causes the gospel to be externally preached to them, and powerfully illuminates their minds by His Holy Spirit, that they may rightly understand and discern the things of the Spirit of God; but by the efficacy of the same regenerating Spirit He pervades the inmost recesses of man; He opens the closed and softens the hardened heart, and circumcises that which was uncircumcised; infuses new qualities into the will, which, though heretofore dead, He quickens; from being evil, disobedient, and refractory, He renders it good, obedient, and pliable; actuates and strengthens it, that like a good tree, it may bring forth the fruits of good actions.
And this is that regeneration so highly extolled in Scripture, that renewal, new creation, resurrection from the dead, making alive, which God works in us without our aid. But this is in no wise effected merely by the external preaching of the gospel, by moral suasion, or such a mode of operation that, after God has performed His part, it still remains in the power of man to be regenerated or not, to be converted or to continue unconverted; but it is evidently a supernatural work, most powerful, and at the same time most delightful, astonishing, mysterious, and ineffable; not inferior in efficacy to creation or the resurrection from the dead, as the Scripture inspired by the Author of this work declares; so that all in whose heart God works in this marvelous manner are certainly, infallibly, and effectually regenerated, and do actually believe. Whereupon the will thus renewed is not only actuated and influenced by God, but in consequence of this influence becomes itself active. Wherefore also man himself is rightly said to believe and repent by virtue of that grace received.
The manner of this operation cannot be fully comprehended by believers in this life. Nevertheless, they are satisfied to know and experience that by this grace of God they are enabled to believe with the heart and to love their Savior.
Faith is therefore to be considered as the gift of God, not on account of its being offered by God to man, to be accepted or rejected at his pleasure, but because it is in reality conferred upon him, breathed and infused into him; nor even because God bestows the power or ability to believe, and then expects that man should by the exercise of his own free will consent to the terms of salvation and actually believe in Christ, but because He who works in man both to will and to work, and indeed all things in all, produces both the will to believe and the act of believing also.