It seems strange that Paul should claim to be set forth as a pattern to those who should believe afterwards. For, as we know, the Lord Jesus Christ is clearly our example eg. I Pet. 2:24. But looking at the context of this passage it is quite clear what Paul is meaning. Jesus had no sin, Paul did; Jesus never needed converting, Paul did. The pattern, or mould, that Paul speaks of is how God takes a sinner and changes him into a wonderful trophy of grace.