Luke 1:28, 34-35, 38

The Annunciation of the Lord

"Hail, favored one! The Lord is with you." Behold, you will conceive in your womb and bear a son, and name him Jesus.
But Mary said to the angel, "How can this be, since I have no relations with a man?" And the angel said to her in reply, "The holy Spirit will come upon you, and the power of the most high will overshadow you. Therefore the child to be born will be called holy, the Son of God." Mary said, "Behold I am the handmaid of the Lord. May it be done to me according to your word."

Luke 1:28, 34-35, 38

☩

Pope Pius XII said True Devotion... aims essentially at union with Jesus under the guidance of Mary. He was speaking about St. Louis de Montfort's consecration to Jesus through Mary. You can find a modern adaptation of it in 33 Days to Morning Glory. You can get the book here: 
https://www.amazon.com/Days-Morning-Glory-Do-Yourself/dp/1596142448