Sunday’s Readings: Isaiah 22:19-23; Psalms 138:1-2, 2-3, 6, 8; Romans 11:33-36; Matthew 16:13-20 BE A ROCK Peter’s history as a follower or friend of Jesus is a bit spot-ty. It might be natural to wonder if Jesus, in giving him the keys to the kingdom, didn’t feel a bit like a parent giving a teenager the…