John recorded this event to build our faith. He wanted us to know about a miracle Jesus performed that fulfilled a particular Old Testament prophecy about the Messiah. The prophets had said that when the Messiah comes, “the vats will overflow with new wine and oil” (Joel 2:24), and “the mountains will drip with sweet wine” (Am 9:13). And a miracle Jesus performed at a wedding in Cana proved He had the power to fulfill those prophecies. When John and the other five disciples who had accompanied Jesus to the wedding saw that miracle, they recognized it was a “sign,” and it caused them to believe even more deeply that Jesus was their promised Savior (Jn 2:11).