14 To this commendation of the Rosary which follows from the very nature of the prayer, We may add that the Rosary offers an easy way to present the chief mysteries of the Christian religion and to impress them upon the mind; and this commendation is one of the most beautiful of all. For it is mainly by faith that a man sets out on the straight and sure path to God and learns to revere in mind and heart His supreme majesty, His sovereignty over the whole of creation, His unsounded power, wisdom, and providence. For he who comes to God must believe that God exists and is a rewarder to those who seek Him. Moreover, because God's eternal Son assumed our humanity and shone before us as the Way, the Truth, and the Life, our faith must include the lofty mysteries of the august Trinity of divine Persons and of the Father's only-begotten Son made Man: "This is eternal life: that they may know thee, the only true God, and Jesus Christ, whom thou bast sent."(3)
Source: Magnae Dei Matris (Vatican.va)