This was taught by Pope Pius XII. "While Peter has the keys of heaven, Mary has the keys to God's heart.." - Pope Pius XII, allocution given on April 21, 1940. Which, by the way, the Catholic Church guarantees, when Mary turns the key, the lock will open: "We could not find a more powerful protectress or one more irresistible before God. She is for us the best of mother, our safest confidante and in fact the very motive our our hope, she obtains all she asks for and her prayer is always heard."- Exultavit Cor Nostrum. Pope Pius IX, Exultavit Cor Nostrum.
Exultavit Cor Nostrum.
“In such a great crisis, everyone can see that all our hopes must be placed in God alone. We must offer Him continual and fervent prayers, so that He may pour out the riches of His mercy on all peoples. We must implore Him to illumine all minds with the light of His heavenly grace, to bring back the erring to the path of justice, to turn back to Himself the rebellious wills of His enemies, to bestow on all a love and fear of His holy name, and to give them the spirit of always thinking and doing whatever is right, whatever is true, whatever is modest, whatever is just, whatever is holy. The Lord is sweet, mild, merciful, and rich for all who call on Him. He receives the prayers of the humble and shows His power in pardon and mercy. Let us approach, venerable brothers, with confidence to the throne of grace, so that we may receive mercy and find favor in His timely aid. Everyone who asks receives, everyone who seeks finds, and everyone who knocks enters.[1]
But first let us give perpetual thanks to the Lord of mercies and let us praise His holy name since He deigns to work the wonders of His mercy throughout the Catholic world. Therefore with one mind and animated with the same sincerity of faith, strength of hope, and ardor of love, let us humbly and strenuously beseech God to deliver His holy Church from all calamities, to expand and exalt it more and more every day among all nations and everywhere on earth, to purge the world of all errors, to lead all men in mercy to the recognition of truth and the way of salvation, to propitiously avert the scourge of His anger which we deserve for our sins, to rule the sea and wind and bring tranquility, to grant peace, to save His people and bless His inheritance and bring it to heaven. That God may more easily incline His ear to our prayers and grant our desires, let us raise our eyes and minds to the most holy Mother of God, whose patronage with God is more prompt and efficacious than any other, for she is our most loving Mother and our greatest source of confidence. Then too let us seek the intercession of the Prince of the Apostles, to whom Christ Himself gave the keys of the Kingdom of Heaven and whom He made the rock of His Church against which the gates of hell can never prevail. Let us also seek the intercession of his Co-apostle Paul, and the particular patrons of each city and region, and all the heavenly company, that by them our gracious Lord may pour out the rich gifts of His goodness.”
paragraph 3 of 5.
http://saints.sqpn.com/pope0255k.htm
NEVER APOLOGIZE FOR THE BLESSED MOTHER - MOTHER ANGELICA
I should hope Mary has the keys to God’ heart, she carried Him beneath hers.
The Communion of the Saints is real and they live in bliss with our God as we all hope to one day.