4 Bible Verses about Changed Heart

Wherefore, if any one is in Christ, he is a new creature; the old things passed away; behold, they have become new.

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

For godly sorrow works repentance unto salvation, not to be repented of; but the sorrow of the world works death.

and he not conformed to this age, but be transformed by the renewing of your mind, that ye may prove what is the good and well-pleasing and perfect will of God.