Paul claimed to be an apostle and saw Jesus. The choice of Matthias to be the successor of Judas by the Eleven was before the descent of the holy spirit at Pentecost. Was Paul the successor of Judas, remembering there were to be but twelve Apostles, and that Matthias was not afterward heard of?
The eleven apostles were acting without authority in selecting Matthias to be the successor of Judas. Jesus had instructed them to stay in Jerusalem and to wait for the outpouring of the holy spirit at Pentecost. It was during this waiting period and before they received the anointing of the holy spirit, [...]