In the Gospel reading from Luke 1, God sent the angel Gabriel to Mary to announce the birth of Jesus, the Son of God, through her. Mary didn't expect all this and naturally, was troubled and puzzled at first. This is how God calls us too. First, there is an element of surprise, then in time we understand what the Lord wants from us. Our role is to do what Mary said to the angel at the end, "May it be done to me according to your word." Know that God calls us when we have found favor with him.