Jesus was reading the minds of those...
Jesus was reading the minds of those Pharisees. They were wondering: What does this lowly carpenter's son know? Why should we listen to him? It takes a measure of God's Spirit to recognize when God is speaking to us. He can speak in many guises. He does not always come in the form of a Ph.D. It makes me wonder whether Ph.D.s can be saved. They may be wondering whether they should even listen to non-Ph.D.s.