4 Bible Verses about Changed Heart

Therefore if any one be in Christ, there is a new creation: the old things are passed way; behold, all things are become new:

But he is a Jew, who is one inwardly, and circumcision is that of the heart, in the spirit, not in the letter; whose praise is not from men, but from God.

For godly sorrow worketh repentance unto salvation not to be repented of, whereas the sorrow of the world worketh death.

And be not conformed to this world, but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect will of God.