The Samaritan woman therefore said to him, "How is it that you, being a Jew, ask for a drink from me, a Samaritan woman?" (For Jews have no dealings with Samaritans.)

 John did not invent the title. In the Old Testament God had often been called the God of salvation, the Saviour, the saving God. Many of the Greek gods had acquired this title. At the time John was writing the Roman Emperor was invested with the title Saviour of the World. It is as if John said: "All that you have dreamed of has at last in Jesus come true." 