Catechism of the Catholic Church
1002 Christ will raise us up "on the last day"; but it is also true that, in a certain way, we have already risen with Christ. For, by virtue of the Holy Spirit, Christian life is already now on earth a participation in the death and Resurrection of Christ:
And you were buried with him in Baptism, in which you were also raised with him through faith in the working of God, who raised him from the dead .... If then you have been raised with Christ, seek the things that are above, where Christ is, seated at the right hand of God. 559
1003 United with Christ by Baptism, believers already truly participate in the heavenly life of the risen Christ, but this life remains "hidden with Christ in God." 560 The Father has already "raised us up with him, and made us sit with him in the heavenly places in Christ Jesus." 561 Nourished with his body in the Eucharist, we already belong to the Body of Christ. When we rise on the last day we "also will appear with him in glory." 562
1004 In expectation of that day, the believer's body and soul already participate in the dignity of belonging to Christ. This dignity entails the demand that he should treat with respect his own body, but also the body of every other person, especially the suffering:
The body [is meant] for the Lord, and the Lord for the body. And God raised the Lord and will also raise us up by his power. Do you not know that your bodies are members of Christ? .... You are not your own; .... So glorify God in your body. 563
English Translation of the Cathechism of the Catholic Church for the United States of America © 1997, United States Catholic Conference, Inc.