Jesus said to them, "Fill the water pots with water." They filled them up to the brim.
Many commentators saw the significance of what they understood to have happened as follows. Jesus’ disciples as well as the servants, and presumably Mary, knew that water had gone into the pots but that wine had come out. The only thing that accounted for the change was Jesus’ instructions. They realized that Jesus had the supernatural power to change water into wine. This miracle thus fortified their faith in Him (John 2:11).