Roman Catholic doctrine teaches that Mary is a Mediatrix between Christians and Christ, and that she is the “dispenser of graces” by the power of the Holy Spirit – based upon the merits of her crucified Son.
Thus there is a mediation: Mary places herself between her Son and mankind in the reality of their wants, needs and sufferings. She puts herself ‘in the middle,’ that is to say she acts as a Mediatrix not as an outsider, but in her position as mother. She knows that as such she can point out to her Son the needs of mankind, and in fact, she “has the right” to do so. Her mediation is thus in the nature of intercession: Mary ‘intercedes for mankind. (Pope John Paul II’s encyclical Redemptoris Mater: On the Blessed Virgin Mary in the life of the Pilgrim Church.