30 To this warm love of Jesus Christ was joined a most sweet and tender devotion towards His glorious Mother, whose motherly love he repaid with the affection of a child, and whom he jealously honored. So great was his confidence in her most powerful intercession, that he did not hesitate to write: "It is the will of God that we should have nothing which has not passed through the hands of Mary." Likewise: "Such is the will of God, Who would have us obtain everything through the hands of Mary."
Source: Doctor Mellifluus (Vatican.va)