4 Bible Verses about Changed Heart

Wherefore if any person be in Christ, he is a new creation: the old things are passed away; behold, all things are become new.

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

For sorrow of a godly sort worketh repentance unto salvation never to be repented of, but worldly sorrow worketh death.

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