At one time you were far away from God and were his enemies because of the evil things you did and thought. But now, by means of the physical death of his Son, God has made you his friends, in order to bring you, holy, pure, and faultless, into his presence. You must, of course, continue faithful on a firm and sure foundation, and must not allow yourselves to be shaken from the hope you gained when you heard the gospel.
God's plan is to make known his secret to his people, this rich and glorious secret which he has for all peoples. And the secret is that Christ in is you, which means that you will share in the glory of God.
Since you have accepted Christ Jesus as Lord, live in union with him. Keep your roots deep in him, build your lives on him, and become stronger in your faith, as you were taught. And be filled with thanksgiving.