…and these whom He justified, He also glorified.
When God decided to reach into your life and reveal Himself to you so powerfully that you would turn to Him in faith and be saved, He began an inevitable process that will end in your experience of glory!
Your glorification is so certain that Paul speaks of it here in the past tense—it has already been accomplished and now it just waits to happen. But what does it mean to be "glorified"? Paul has already described this glorification in verses 18-25.
It means that God is going to restore all things to the way He intended them to be all along, before sin and the Fall of mankind damaged all of creation. In place of this fallen world, God is going to create "a new heaven and a new earth" (Revelation 21:1-5).
In place of our fallen bodies, which so often struggle with sickness and pain and death, we will have unfallen, redeemed, glorified bodies (Romans 8:23). Where we now struggle and battle constantly with our fallen sinful nature that draws us away from God and into selfishness, when we are glorified we will leave that nature behind and live forever in unhindered love for our Lord and one another (Revelation 22:3-5).
You are not there yet, but God wants you to know that that is the beautiful destination you are traveling toward in your relationship with Him.