On the last day of the Festival of Tabernacles, Jesus stood up and declared, "if anyone thirsts, let him come to me and drink. Whoever believes in me, out of his heart will flow rivers of living water. "Each day during the week celebrating Harvest, the High Priest would carry a golden pitcher and fill it with water from the pool of Siloam while the people recited Isaiah 12:3, "With joy will you draw water from the wells of salvation." What is Jesus saying about himself, and what difference does it make?