Here are some quotes from the Saints regarding the Virgin Mary’s role as intercessor:
“Those who have great devotion to Mary not only will be saved, but also will, through her intercession, become great Saints. Furthermore, their holiness will grow from day to day .”- Saint Vincent Pallotti
“When our hands have touched spices, they give fragrance to all they handle. Let us make our prayers pass through the hands of the Blessed Virgin. She will make them fragrant.” - Saint John Vianney
“In dangers, in doubts, in difficulties, think of Mary, call upon Mary. Let not her name depart from your lips, never suffer it to leave your heart. And that you may obtain the assistance of her prayer, neglect not to walk in her footsteps. With her for guide, you shall never go astray; while invoking her, you shall never lose heart; so long as she is in your mind, you are safe from deception; while she holds your hand, you cannot fall; under her protection you have nothing to fear; if she walks before you, you shall not grow weary; if she shows you favor, you shall reach the goal.”- Saint Bernard of Clairvaux
“The Blessed Virgin Mary has the power of delivering souls from purgatory by her prayers, and by applying her merits for them. This is especially true for souls that were devoted to her on earth.” - Saint Bernardine of Siena
“Take shelter under our Lady’s mantle, and do not fear. She will give you all you need. She is very rich, and besides is so very generous with her children. So take advantage without fear and with complete confidence, whenever you need anything. She loves giving.” - St. Raphaela Mary
And I end with this quote:
“The reason why Christ is unknown today is because His Mother is unknown.” - Saint Cardinal John Henry Newman