In the first verses of the chapter, he tells the Corinthians that the gospel is a resurrection gospel.  In verses 1-11, he is dealing with the death and resurrection of the Lord Jesus.  He says that the gospel is this message—“Christ died for our sins according to the Scriptures, He was buried, and He was raised on the third day according to the Scriptures.”  There were some in the church who evidently had bought into the philosophy of the day, and so Paul deals with that in verses 12-19 and says that we have resurrection hope. But when we come to verse 20, the tenor of the text shifts dramatically.  It is a pivotal verse in which the assertion is made that the resurrection is not a theory, but a fact.  In the first three words of the verse, ‘But in fact,’ Paul moves from the hypothetical to the factual, from the ‘what if’ to the ‘what is.’  So I want to pick up in verse 20 and read through verse 28.  The theme of these verses is ‘resurrection guarantee’ and they show how Christ’s resurrection is what secures the believer and ensures his own future resurrection.