In "THE NATURE, CAUSES, AND MEANS OF REGENERATION" (see here) John Owen wrote (Chapter V): (emphasis mine)
"This is the whole of what we plead: God in our conversion, by the exceeding greatness of his power, as he wrought in Christ when he raised him from the dead, actually worketh faith and repentance in us, gives them unto us, bestows them on us; so that they are mere effects of his grace in us. And his working in us infallibly produceth the effect intended, because it is actual faith that he works, and not only a power to believe, which we may either put forth and make use of or suffer to be fruitless, according to the pleasure of our own wills.
And the end of the work of God described is not a power to obey, which may be exerted or not; but it is actual obedience in conversion, and all the fruits of it."
That this view of Owen was the view of those Baptists who first put forth the 1689 London Confession of Faith cannot be denied. How does what Owen says refute hardshellism?
Don't Hardshells say that "regeneration" merely gives one the power to believe and repent, and not faith and repentance themselves? Don't they say that this "regenerated" person, who is not yet a believer or penitent, may or may not believe and repent, depending upon his own free choice to use that power, or as Owen says, to "put forth and make use of...according to the pleasure of our own wills"?