For Catholics, there are different types of Marian prayer that
reflect different intentions. Reciting the
"Magnificat," for
example, is a way to praise God as Mary did. By reciting the
"Angelus," you commemorate
an event in salvation history, one in which Mary had a major
role. Such commemorations are also made by the entire Church in
the liturgical cycle. At Christmas, for example, the faithful
recall Mary's role in the birth of Christ.
Prayers invoking Mary's intercession for your own personal
intentions are in a separate class, arousing controversy since
the time of the Reformation in the sixteenth and seventeenth centuries.
The practice of invoking saintly people for their intercession
before God in union with Jesus has roots in sacred Scripture. In
this regard,
Matthew 18:19-20 refers to saints
on earth, and
Revelation 18:20 refers
to saints in heaven. In the early centuries of the Church,
veneration and invocation was offered to those martyred for
Christ. The practice derives from the doctrine that the
saints are united with Jesus in one mystical body
(Rm 12:5).
The practice of calling on Mary for aid also appears to be very
old in the Catholic Church. An ancient testimony of confidence in
Mary is the prayer Sub Tuum, which historians place in
the third century:
We fly to your patronage,
O holy Mother of God;
despise not our petitions in our necessities,
but deliver us always from all dangers,
O glorious and blessed Virgin.
(Dictionary of Mary, p. 143)
This practice became an area of significant disagreement between
Catholics and Protestants. After the crisis of the Reformation,
the Catholic Council of Trent repeated traditional Christian
teaching on the intercession of the saints, which applies
preeminently to Mary:
The saints who reign together with Christ, offer up their prayers to God for men; ... it is good and useful to invoke them suppliantly and, in order to obtain favors from God through his Son Jesus Christ our Lord who alone is our Redeemer and Saviour, to have recourse to their prayers, assistance and support.
(Theotokos, p. 188)
The Synod of Jerusalem held by the Orthodox Church proclaimed a
similar position about a century after Trent. Protestants
counter that reliance on Mary and the saints detracts from
reliance on Jesus Christ, who is our 'one mediator':
For there is one God, and one mediator also between God and men, the man, Christ Jesus, who gave Himself as a ransom for all, the testimony borne at the proper time.
(1 Tm 2:2-5 - New American Bible)
A thorough examination of this topic by the Lutheran-Catholic
Dialogue Commission may be found in The One Mediator, The
Saints and Mary (Augsburg Press, 1992). An excellent
contemporary Catholic reflection on the subject is found in
chapter 3 of Pope John Paul II's 1987 encyclical, Mother of
the Redeemer. A small subsection of paragraph 38 of that
chapter is as follows:
The Church knows and teaches with Saint Paul that there is only one mediator: "For there is one God, and there is one mediator between God and men, the man Christ Jesus, who gave himself as a ransom for all." (1 Tm 2:5-6).The maternal role of Mary toward people in no way obscures or diminishes the unique mediation of Christ, but rather shows its power [Vatican II Constitution on the Church, # 60]: it is mediation in Christ.
Catholics do not pray to Mary as if she were God. Prayer to Mary is memory of the great mysteries of our faith (Incarnation, Redemption through Christ in the rosary), praise to God for the wonderful things he has done in and through one of his creatures (Hail Mary) and intercession (second half of the Hail Mary). The latter is addressed to Mary not as to a vending machine but a support person helping us to discern the will of God in our lives. Mary is a volunteer, highly recommendable and recommended, but not a mandatory and inescapable passage.