'Holiness' in the Bible

For our proud confidence is this: the testimony of our conscience, that in holiness and godly sincerity, not in fleshly wisdom but in the grace of God, we have conducted ourselves in the world, and especially toward you.

And all of us, with unveiled faces, reflecting like bright mirrors the glory of the Lord, are being transformed into the same likeness, from one degree of radiant holiness to another, even as derived from the Lord the Spirit.

Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.