Not Impressed By Jesus?

Luke 5:1-11 — In this text we have the Miracle of the Great Catch which culminated in Peter’s wonderful confession of faith, “Depart from me; for I am a sinful man, O Lord.”  This was a glorious realisation, but the curious thing is that Peter had already witnessed several displays of Jesus’ divine power, some of them greater than this one. So why was it this miracle that caused Peter to understand who Jesus was?