A Soft Stone?

Title: Institutes of the Christian Religion, Book 2nd, Chapter 3, Section 6
Author: John Calvin

How can it be said that the weakness of the human will is aided so as to enable it to aspire effectually to the choice of good, when the fact is, that it must be wholly transformed and renovated? If there is any softness in a stone; if you can make it tender, and flexible into any shape, then it may be said, that the human heart may be shaped for rectitude, provided that which is imperfect in it is supplemented by divine grace. But if the Spirit, by the above similitude, meant to show that no good can ever be extracted from our heart until it is made altogether new, let us not attempt to share with Him what He claims for himself alone. If it is like turning a stone into flesh when God turns us to the study of rectitude, everything proper to our own will is abolished, and that which succeeds in its place is wholly of God. I say the will is abolished, but not in so far as it is will, for in conversion everything essential to our original nature remains: I also say, that it is created anew, not because the will then begins to exist, but because it is turned from evil to good. This, I maintains is wholly the work of God, because, as the Apostle testifies, we are not “sufficient of ourselves to think any thing as of ourselves” (2 Cor. 3:5).