"The day Mary said yes is the day the human race made a new start."
Today is Rorate Sunday, the name taken from the first word of the Introit for today's Mass, and a text often heard in the beautiful plain chant of the hymn "Rorate Caeli de super". And it is a fitting text for the day the Church sets aside during Advent to recall Mary's "Fiat' to the Archangel's message which was the dawn of our salvation.
Father Bradford of St. Athanasius preached a sermon on this topic which was published in the Advent 2009 issue of Anglican Embers (Volume II, Number 12).
Read, mark, learn, and inwardly digest: http://www.anglicanuse.org/AE_02_12-Bradford_Our_Lady_in_Advent.pdf
As a bonus, the last page also includes the poem "Anagram on Mary" by Anglican pastor and poet George Herbert.