From the lofty heights of being called "blessed" and "the rock" upon which Jesus will build His Church, where hear Peter in today's gospel tumble to the depths of being called "Satan" and "a stumbling block" by Jesus. What led to such different responses from Jesus? Inspired thought vs. human thinking. The Lord implores us to deny ourselves for His sake and to not be conformed to this age, but transformed by the renewal of our minds.