'Unchanged' in the Bible

But by your hard and unchanged heart you are storing up wrath for yourself in the day of the revelation of God's judging in righteousness;

You are still worldly [controlled by ordinary impulses, the sinful capacity]. For as long as there is jealousy and strife and discord among you, are you not unspiritual, and are you not walking like ordinary men [unchanged by faith]?

For when one of you says, “I am [a disciple] of Paul,” and another, “I am [a disciple] of Apollos,” are you not [proving yourselves unchanged, just] ordinary people?

For it is life to us if you keep your faith in the Lord unchanged.