15 No less to be approved, no less suitable for the fostering of Christian piety was this devotion declared to be by Our predecessor of happy memory, Pius XI. In an encyclical letter he wrote: "Is not a summary of all our religion and, moreover, a guide to a more perfect life contained in this one devotion? Indeed, it more easily leads our minds to know Christ the Lord intimately and more effectively turns our hearts to love Him more ardently and to imitate Him more perfectly."(10)
Source: Haurietis Aquas (Vatican.va)