Haurietis Aquas §30

³⁰ Assuredly, when He who is the only begotten of the Father and the Word made flesh "full of grace and truth"(24) had come to men weighed down with many sins and miseries it was He alone, from that human nature united hypostatically to the divine Person, Who could open to the human race the "fountain of living water" which would irrigate the parched land and transform it into a fruitful and flourishing garden.