Now we're getting somewhere.
Ok, given those quotes from Jesus, would we interpret those things the same way, if perhaps, Augustine had never solidified the doctrine of original sin? It seems that Jesus is used as a puppet to back up church dogmas that did not emerge until decades, if not hundreds of years after either Jesus or Paul. For example, lets say that the agnostics had won the battle for supremecy in church philosophy (I know it doesn't sit well, but just bear with me for a minute). And for all of the centuries since then, there had been no doctrine of original sin. Could we not then interpret Jesus' teachings above in a different way? Perhaps when he says born again, he means coming to a sense of self awareness.
My point being, Jesus teachings, in their raw form, existed before the ratification of church dogma, and therefore could have been interpreted any number of ways, depending on what those dogmas eventually became.
By dogma, for clarification, I mean a belief that cannot be proven, but is taught under the authority of the church (and coincidentally by pain of hell-fire).