This is the image of baptismal waters bringing the Holy Spirit into our lives, nourishing the body of Christ in body, mind, and spirit. It is written at the end of John’s Revelation, “[the angel] showed me a river of the water of life, clear as crystal, coming from the throne of God and of the Lamb, in the middle of its street. On either side of the river was the tree of life, bearing twelve kinds of fruit, yielding its fruit every month; and the leaves of the tree were for the healing of the nations.”