Then Mary said to the angel, “How can this be, since I do not know a man?” And the angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Highest will overshadow you; therefore, also, that Holy One who is to be born will be called the Son of God. … Then Mary said, “Behold the maidservant of the Lord! Let it be to me according to your word.” And the angel departed from her. (Luke 1:34–35, 38; NKJV)

One of the interesting things we find reading through books of the Bible is seeing how different passages relate to each other. For example, God often places narratives side-by-side to highlight key ideas (called parallelism). Luke wrote the narratives of Zacharias and Mary in this way, highlighting the idea of trusting in God and His promises.