Not everyone is called to minister to others. We all have talents or abilities we are good at. Those Christian converts were obviously not good at ministering and should not have been ministering being so newly converted. I've lived as a Christian for most of my life and when I attempt to answer questions about my faith I still get a little uneasy inside hoping I do not mis-lead someone with the way I explain a Christian concept or leave out information. Christianity uses metaphors and Jesus even used parables to teach different concepts. What is a metaphor/symbollic, the multi-meanings of different passages or other story telling device in the bible is open to debate. The fish is obviously a metaphor or symbol just like when it was Christian dogma that the earth was flat and that the sun revolved around it.