Christ’s resurrection means that we can be certain that we will be resurrected after we die:

But now Christ has been raised from the dead, the firstfruits of those who have fallen asleep. For since death came through a man, the resurrection of the dead also came through a man. For just as in Adam all die, so also in Christ all will be made alive. But each in his own order: Christ, the firstfruits; then when Christ comes, those who belong to him. (1 Corinthians 15:20-23 NET)

In the same way that being included with Adam brought us death, belonging to Christ assures us that we will rise again after we die. Christ’s present resurrected life is a promise to those who belong to Him that they will be brought with Him into the same resurrected life when he returns.

Christ’s resurrection included the resurrection of his body and so will ours. Paul tells us that the sort of body that Christ had when he walked the earth after His resurrection and with which He ascended and now rules from heaven is the same sort of body that we will have when we are raised at His coming.

It is the same with the resurrection of the dead. What is sown is perishable, what is raised is imperishable. It is sown in dishonor, it is raised in glory; it is sown in weakness, it is raised in power; it is sown a natural body, it is raised a spiritual body. If there is a natural body, there is also a spiritual body. So also it is written, “The first man, Adam, became a living person”; the last Adam became a life-giving spirit. However, the spiritual did not come first, but the natural, and then the spiritual. The first man is from the earth, made of dust; the second man is from heaven. Like the one made of dust, so too are those made of dust, and like the one from heaven, so too those who are heavenly. And just as we have borne the image of the man of dust, let us also bear the image of the man of heaven. (1 Corinthians 15: 42-49 NET)

Our resurrected body will be a reproduction of the one the man of heaven has. Just as our identification with Adam brought us perishable bodies, our identification with Christ in his resurrected life will bring us imperishable bodies. The mortal will become immortal, so that we can sing along with Paul and Isaiah:

This is the hope we have. We will be raised with incorruptible bodies to live forever with the One who takes us with Him in His resurrection.

Christ’s resurrection changes things for us right now in the life we live as believers.

But God, being rich in mercy, because of his great love with which he loved us, even though we were dead in transgressions, made us alive together with Christ—by grace you are saved! and he raised us up with him and seated us with him in the heavenly realms in Christ Jesus.. (Ephesians 2:4-6 NET)

The resurrected life that comes into completeness at our glorification when we receive our resurrected bodies is already within us. We have been made alive together with Christ and  a new sort of life has begun—a recreated life:

Therefore we have been buried with him through baptism into death, in order that just as Christ was raised from the dead through the glory of the Father, so we too may live a new life. For if we have become united with him in the likeness of his death, we will certainly also be united in the likeness of his resurrection. (Romans 6:4,5 NET)

Our new life is grounded in our association with Christ’s resurrection. Because we are in Christ, we are new creation. We have begun our lives in the realm of the resurrection and sin no longer has dominion over us: the old things have passed away and the new things have come. The changed life we have—the life in the Spirit—comes to us through our inclusion with the risen Christ; and based on this new reality, we are called to live a new kind of life.

Therefore, if you have been raised with Christ, keep seeking the things above, where Christ is, seated at the right hand of God. Keep thinking about things above, not things on the earth, for you have died and your life is hidden with Christ in God. When Christ (who is your life) appears, then you too will be revealed in glory with him. So put to death whatever in your nature belongs to the earth…. (Colossians 3:1-5a NET)

We are urged to put aside the things we once loved and the passions we once followed as the old sort of person we once were. Now we have been clothed with the new person, one “that is being renewed in knowledge according to the image of the one who created it (Colossians 3:10)”; and we are called to have new loves and new passions, seeking heavenly things. We must clothe ourselves in the power of the resurrection and live according to the fruit the Spirit produces within us.

As men and women of the new life, we need to “present [ourselves] to God as those who are alive from the dead and [our] members to God as instruments to be used for righteousness (Romans 6:13 NET).” We can do this knowing that there is no reason for sin to defeat us as we work out the victory over sin that has already become reality in Christ’s resurrection, a victory that will come to its consummation when we are raised with Him when He comes again.