St. Alphonsus Liguori

Today is his feast. Here is an excerpt from his book The Glories of Mary:

And here we say, that although Mary, now in heaven, can no longer command her Son, nevertheless her prayers are always the prayers of a Mother, and consequently most powerful to obtain whatever she asks. "Mary," says Saint Bonaventure, "has this great privilege, that with her Son she above all the Saints is most powerful to obtain whatever she wills." And why? Precisely for the reason on which we have already touched, and which we shall later on again examine at greater length, because they are the prayers of a mother. And therefore, says Saint Peter Damian, the Blessed Virgin can do whatever she pleases both in heaven and on earth. She is able to raise even those who are in despair to confidence; and he addresses her in these words: "All power is given to thee in heaven and on earth, and nothing is impossible to thee, who canst raise those who are in despair to the hope of salvation."

And then he adds that "when the Mother goes to seek a favor for us from Jesus Christ" (whom the Saint calls the golden altar of mercy, at which sinners obtain pardon), "her Son esteems her prayers so greatly, and is so desirous to satisfy her, that when she prays, it seems as if she rather commanded than prayed, and was rather a queen than a handmaid. Jesus is pleased thus to honor His beloved Mother, who honored Him so much during her life, by immediately granting all that she asks or desires. This is beautifully confirmed by Saint Germanus, who addressing our Blessed Lady says: "Thou art the Mother of God, and all powerful to save sinners, and with God thou needest no other recommendation; for thou art the Mother of true life." — From Glories of Mary, Chapter VI