Posted 30 June 2008 - 11:27 AM
Peter developed in such a way that he became more steadfast in the face of persecution or threats. In the beginning he still denied being a disciple of Jesus, in a later case he came out and did not deny it. I see a development in that, that he becomes more steadfast as a rock. On such a mentality, a church can be built. Jesus says it in a predictive manner, as if he isn't that rock yet, but has the ability to develop in that direction. That's how I interpret it.
St-Paul was already strong, but as a persecutor. Probably he only needed to change the direction of his aims.