I am unaware of what prominent Catholic teaches this.
Really...Is this prominent enough??? Your popes teach this...
Pope Leo XIII, Adjutricem populi, 5 September 1895: O Virgin most holy, none abounds in the knowledge of God except through thee. None, O Mother of God, obtains salvation except through thee. None receives a gift from the throne of mercy except through thee.
Mary is given authority over the Earth...She provides salvation, hope, love, healing and every thing else that is attributed to God...
She does? It appears that I am going wrong when I say (Night Office of the Liturgy of the Hours, every night) "Protect us, Lord, as we stay awake; watch over us as we sleep, that awake we may keep watch with Christ, and asleep, rest in his peace."
No you just haven't gotten to that part yet...Nah...I believe you are just playing ignorant...More popish stuff...
Pope Pius XII, Letter to Cardinal Maglione of 15 April 1940: Since as St. Bernard declares, "It is the will of God that we obtain all favors through Mary," let everyone hasten to have recourse to Mary...So powerful indeed is the Blessed Virgin with God and His only-Begotten Son that, as Dante writes, "anyone who desires His help and fails to have recourse to Mary is like one trying to fly without wings."
Perhaps I go wrong when I recite the Gospel Canticle: "Lord, now let your servant go in peace; your word has been fulfilled: my own eyes have seen the salvation which you prepared in the sight of every people:
You must be one of them Catholic Clerics...
Canticle
1. (Christianity / Ecclesiastical Terms) a nonmetrical hymn, derived from the Bible and used in the liturgy of certain Christian churches
Apparently, I can't say this as it denies Mary's role. I am having difficulty finding any Mary Worship in Ordinary Time; I can't find it in Advent either. Damn, this doctrine of Mary as redeemer is hard to find
Well that's odd isn't it...A non Catholic can find it all over the place...
Pope Pius XI, Address of 15 August 1933: God alone gives grace according to the measure which in His infinite wisdom He foresees. But although that grace comes from God, it is given through Mary, our Advocate and Mediatrix, since motherly affection on the one hand find response in childlike devotion on the other.