When Mary said Let it be done unto to me according to thy word to the Angel Gabriel, she conformed Her will to God’s as expressed by His messenger. We should totally conform our will to God’s, following Mary’s example. And we should accept His messenger, whether it be an angel, or in the case of Balaam in the Old Testament a Jackass. However God shows us His will, let us accept it joyfully as Mary did!
The Annunciation - Let us pray for true humility of heart.
The First Joyful Mysery, The Annunication. "Let it be done unto me according to thy word." Mary's great fiat, which makes her co-redemptrix,