The remaining disciples must now take action to restore their ranks to a full complement of twelve. Luke makes sure that we know this is not an unintended development. In verses 16-20 Peter re-tells the tale of Judas' betrayal and ultimate fate through the eyes of scripture which "had to be fulfilled." "Proof-from-prophecy" is one of Luke's favorite ways of validating events surrounding the newly emerging church. The Christian community in no way belittles its Jewish heritage in Luke's tradition. It is the fulfillment of all that God had promised the "chosen people."

The remaining apostles must now undertake the task of admitting a new member to their exclusive ranks. Luke has Peter stipulate careful criteria for the selection of this twelfth man. The new apostle (for Luke all Christians a…