Colossians 1:23, 27

But you must continue to believe this truth and stand firmly in it. Don’t drift away from the assurance you received when you heard the Good News. The Good News has been preached all over the world, and I, Paul, have been appointed as God’s servant to proclaim it.

For God wanted them to know that the riches and glory of Christ are for you Gentiles, too. And this is the secret: Christ lives in you. This gives you assurance of sharing his glory.