sanctification has a twofold application in scripture. First, one is sanctified by the Spirit when he is saved and put into the body of Christ. Secondly, he is "called" to be sanctified. In other words, he is called to personal sanctification where his walk will match his position as a son of God.
Here, is a passage that speaks of the first. Check it out.
2 Thess 2:13 But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning (the beginning for gentiles was in Acts 10) chosen you to salvation through sanctification of the Spirit and belief of the truth:
14 Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ. (this verse speaks of predestination to a glorified body)
Here are a couple that speaks of the second:
1 Cor 1:2 Unto the church of God which is at Corinth, to them that are sanctified in Christ Jesus, called to be saints, with all that in every place call upon the name of Jesus Christ our Lord, both their's and our's:
Set apart "in" Christ Jesus but called to be set apart. The context will explain why and how.
Here is another;
2 Tim 1:8 Be not thou therefore ashamed of the testimony of our Lord, nor of me his prisoner: but be thou partaker of the afflictions of the gospel according to the power of God;
9 Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,
10 But is now made manifest by the appearing of our Saviour Jesus Christ, who hath abolished death, and hath brought life and immortality to light through the gospel:
The purpose of God in Christ is the same here as it is in Rom 8 and Eph 1, and that purpose is to form the body of Christ, "now" as it is said in v 10, and then to glorify it, the immortality of the body, which is future. Eternal life comes before the immortality of the body.
Our calling as the body of Christ is to glory! This is the ultimate sanctification.