Also:
*1. Whosoever shall faithfully serve me by the recitation of the Rosary shall receive signal graces.
Signal Graces are those special and unique Graces to help sanctify us in our state in life. See the remaining promises for an explanation for which these will consist. St. Louis de Montfort states emphatically that the best and fastest way to union with Our Lord is via Our Lady [True Devotion to Mary, chapter four].
2. I promise my special protection and the greatest graces to all those who shall recite the Rosary.
Our Lady is our Advocate and the channel of all God’s Grace to us. Our Lady is simply highlighting that She will watch especially over us who pray the Rosary. (see Lumen Gentium chapter VIII - Our Lady #62) [a great more detail is available on this topic in True Devotion to Mary, chapter four, by St. Louis de Montfort]
3. The Rosary shall be a powerful armor against hell, it will destroy vice, decrease sin and defeat heresies.
This promise, along with the next, is simply the reminder on how fervent prayer will help us all grow in holiness by avoiding sin, especially a prayer with the excellence of the Rosary. An increase in holiness necessarily requires a reduction in sin, vice, and doctrinal errors (heresies). If only the Modernists could be convinced to pray the Rosary! (see Lumen Gentium chapter V - The Call to Holiness #42) St. Louis de Montfort states “Since Mary alone crushed all heresies, as we are told by the Church under the guidance of the Holy Spirit (Office of the Blessed Virgin Mary)…” [True Devotion to Mary #167]
…*
ourladyswarriors.org/prayer/15promise.htm
Re. Co-Mediatrix:
*Church Teaching on Mary as Mediatrix of (All) Graces
Compiled by Fr. William G. Most
- Leo XIII, Encyclical, Supremi Apostolatus officio. Sept 1, 1883. *** 16, 1883. 1113.
We judge nothing more powerful and better for this purpose than by religion and devotion to deserve well of the great Mother of God, the Virgin Mary, who is the treasurer [sequestra] of our peace with God, and the mediatrix [administra] of graces…
- Leo XIII, Encyclical, Superiore anno, August 30, 1884. *** 17, 1884. 49.
… may He hear the prayers of those who beseech through her, whom He Himself willed to be the mediatrix [administram] of graces.
- Leo XIII, Encyclical, Octobri mense adventante, Sept 22, 1891, *** 24, 1891, 196.
… it is right to say, that nothing at all of that very great treasury of all grace which the Lord brought us–for ‘grace and truth came through Jesus Christ’ [Jn 1.17]–nothing is imparted to us except through Mary, since God so wills, so that just as no one can come to the Father except through the Son, so in general, no one can come to Christ except through His Mother.
- Leo XIII, Encyclical, Iucunda semper, Sept 8, 1984. *** 27, 1894. 179.
… when He [the Father] has been invoked with excellent prayers, our humble voice turns to Mary; in accordance with no other law than that law of conciliation and petition which was expressed as follows by St. Bernardine of Siena : ‘Every grace that is communicated to this world has a threefold course. For by excellent order, it is dispensed from God to Christ, from Christ to the Virgin, from the Virgin to us.’ [Internal quote from S. Bernardine, Sermon on Nativity of B. V. M. n. 6.]
…*
fwiw.