And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out of their flesh…
Regeneration is a change of principle. The principle of a natural man in his religious actions is artificial; he is wound up to such a peg, like the spring of an engine, by some outward respects which please him, but as the motion of an engine ceases when the spring is down, so a natural man's motion holds no longer than the delight those motions give him which first engaged him in it. But the principle in a good man is spirit, an eternal principle; and the first motion of this principle is towards God, to act from God and to act for God.
Parallel VersesKJV: And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out of their flesh, and will give them an heart of flesh: