Everyone is talking about Jesus. The crowd seems to be making an honest attempt at inquiry and they are being condemned by the leaders for being ignorant of the law. It sounds like bullying on a play ground. They disqualified Jesus on account of where he grew up. Nazareth is no place for a Messiah.
Jesus promises that if anyone is spiritually thirsty and comes to drink the result will be that rivers of life will flow from him. The spiritually thirsty person will be overwhelmed by the refreshment that takes up residence in him that he will become a source of refreshment. Only the Holy Spirit can make a parched soul into a source of spiritual life! Wow!