Speaking as Peter was both challenging and encouraging.  Trying to get into the mind of someone is a challenge.  What were they thinking at various points in their life.  Sometimes with Peter I read what he says and want to slap him and ask "What could you possibly have been thinking?"  I attempted to bring out the confusion Peter must have felt as Jesus rebuked him numerous times for just giving his two cents worth.  In the end I was struck with the ways in which Peter wanted to meet Jesus on his own terms, not on God's terms.  One passage i could considered turning to in addition to those mentioned was Mark 10 where the disciples rebuked people for bringing little children to Jesus.  It just seems so logical to protect the teacher from the children...Somehow, God's logic is often different from ours!

SMJ