O Mary Mother of Mercy and ...

O Mary Mother of Mercy and Refuge of Sinners! We beseech thee to look with pitying eyes on poor heretics and schismatics. Do thou, who art the Seat of Wisdom, enlighten the minds wretchedly enfolded in the darkness of ignorance and sin, that they may clearly recognize the Holy, Catholic, Roman Church to be the only true Church of Jesus Christ, outside of which neither sanctity nor salvation can be found.
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 Pope Pius XII

Quotes from the same author

But the knowledge and love of our Divine Redeemer, of which we were the object from the first moment of His Incarnation, exceed all that the human intellect can hope to grasp. For hardly was He conceived in the womb of the Mother of God, when He began to enjoy the Beatific Vision, and in that vision all the members of His Mystical Body were continually and unceasingly present to Him, and He embraced them with His redeeming love
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 Pope Pius XII
Christian mothers, if only you knew the future of distress and peril, of shame ill-restrained, that you prepare for your sons and daughters in imprudently accustoming them to live hardly clothed and in making them lose the sense of modesty, you should be ashamed of yourselves and of the harm done the little ones whom heaven entrusted to your care, to be reared in Christian dignity and culture.
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 Pope Pius XII
The day the Church abandons Her universal tongue will be the day before She returns to the Catecombs.
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 Pope Pius XII
To desire grace without recourse to the Virgin Mother is to desire to fly without wings.
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 Pope Pius XII
There always exists an absolute norm to be preserved
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 Pope Pius XII