7 Now, to appease the might of an outraged God and to bring that health of soul so needed by those who are sorely afflicted, there is nothing better than devout and persevering prayer, provided it be joined with a love for and practice of Christian life. And both of these, the spirit of prayer and the practice of Christian life, are best attained through the devotion of the Rosary of Mary.
Source: Magnae Dei Matris (Vatican.va)