I was looking up this idea of co-redemption for a friend of mine who is dying from cancer. I found this web site called “
justforcatholics.com” which has apologetics from an Evangelical to Catholics. Here is what is said about this:
Are we co-redeemers?
Question I can assure you that we Catholics believe in His completed work and suffering at Calvary’s cross. However, as the Bride of Christ, His Body, our sufferings are so united with Christ’s that we can offer them in union with His redemptive work for the salvation of souls (Colossians 1:24). The Lord Jesus Christ uses the suffering of his people to draw souls to salvation to be found only through Christ. That is what redemptive suffering is all about.
Answer There is great value in the Christian’s work and suffering in Christ. For one thing, as you said, the Lord Jesus brings souls into His kingdom, and builds them up in grace, through the painstaking work of His ministers and His people. Sadly, the idea of “redemptive suffering” as used in Catholic theology, is not limited to this sense. The Catholic Church teaches that the works, prayers and sufferings of the saints are united with that of Christ to merit our redemption (see
Catechism paragraphs 618, 1476, 1477). That idea is wrong.
We must make a very clear distinction between the finished work of Christ on the cross for our redemption, and His work in and through us for the edification of the church.
Christ redeemed His people, that is, paid the ransom for their liberation and forgiveness, by His death on the cross. He came to give "His life a ransom for many,” and believers say, “we have redemption through His blood, the forgiveness of sins,” and He “has redeemed us to God by Your blood,” and again, “by His own blood He entered the Most Holy Place once for all, having obtained eternal redemption.” (Matthew 20:28; Ephesians 1:7; Colossians 1:14, Revelation 5:9; Hebrews 9:12).
So redemption has been obtained, once for all, by the death of Christ on the cross. His preaching or His miracles did not achieve redemption. Neither is Christ now obtaining redemption by working in or through His people. To be sure, the Lord is intimately involved in the lives of His children, and being spiritually united with them, their afflictions are also His. Moreover, there is value in the Christian suffering - for mortification of sin, the strengthening of faith and character. At the end, the Lord will also recompense and glorify His people for their suffering on earth. Yet nowhere does the Scripture teach that Christians participate with Christ in His sacrifice, suffering and death to achieve redemption. His blood has already obtained that.
So, briefly,
*]By His death, Christ has already obtained redemption
*]The purpose of the Christians’ suffering is not redemptive.