Mary is the Mediatrix of all Grace.
Grace was won for us by Jesus on the Cross, is distributed to us through the hands of Mary, and is applied to us through the action of the Holy Spirit.
All grace is distributed to us through the hands of Mary. Every grace from every prayer comes to us through the hands of Mary and because Mary wills that it be so. Every return to grace by every sinner who confesses in the confessional comes to us through Mary because she wills it in accordance with her son’s wishes. Every grace recieved by every reception of the Eucharist comes to us through the hands of Mary.
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.
Pius XI, Encyclical, Ingravescentibus malis, Sept 29, 1937, AAS 29, 1927, 380.
… we know also that all things are imparted to us from God the Greatest and Best, through the hands of the Mother of God.
Jesus is the King, and Mary is his Queen. Mary has been given the key to the treasury of grace which Her Son the King has won and established. That is how high Mary is, above all the angels and saints, a Queen second only to her Son the King.
It will be the fifth marian dogma. I hope it will be within my lifetime.
-Tim-