Look over Luke 1:5-25; 57-66.

Annunciation of the Angel to Zechariah by Domenico Ghirlandaio (1490, fresco in the Tornabuoni Chapel, Florence) Public Domain
We all know the story, don’t we? Zacharias (an “official” “ordained-type” priest) goes in his proper time to offer incense within the Temple. The Angel Gabriel appears to him there, announcing the upcoming birth of John the Baptist, along with his role as forerunner and preparer of the way of the Lord.
Zacharias responds, objecting, “How will I know this for certain? For I am an old man and my wife is advanced in years.” [v. 18] Gabriel then identifies himself by name, and declares that Zacharias will be mute until his words were fulfilled.
Time passes and so things come about. Zacharias regains his voice finally upon naming his son “John” at his circumcision, in response to community objections because this is not family name of their line.
We all know the story.
Now, please look over Luke 1:26-56.

The Annunciation by Pinturicchio (1501, fresco in the Cappella Baglioni, Collegiata di Santa Maria Maggiore, Spello) Public Domain
We all know this story, too, don’t we? We see this played out in Christmas pageants almost annually, no? The Angel Gabriel appears to Mary, declares her favored, calms her confusion, and announces that she will conceive the Son of the Most High and name Him Jesus.
Mary seems to respond much as did Zacharias, pointing out a physical incongruity as she says, “How can this be, since I am a virgin?” [v. 34]
But far from punishing her, as it could seem Gabriel did to Zacharias, the angel answers graciously with not only the answer to her question (that the power of the Most High would overshadow her), but he gives her an additional sign declaring that Elizabeth (her kinswoman) is six months along expecting the birth of John. Their exchange ends with “’nothing will be impossible with God.’ And Mary said, ‘Behold the bondslave of the Lord; may it be done to me according to your word.’ And the angel departed from her” [vv. 37-38]
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So, like, am I the only one who ever wondered, “what’s the difference here?”
Zacharias clearly ticked Gabriel off, while Mary didn’t. It’s one thing to point to the “rank order” difference between them. There’s certainly a difference of “graciousness” between them. Lots of flavorful differences, but I always sensed there was more here than that.
And… why should we care? What difference does, or should, it make to us… to you and me… here and now… why these two encounters went the way they did?
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I think the answer to both questions is the same one… “Faith”.
The difference between the two encounters is “Faith”. And the reason we should care, is also “Faith”.
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It never dawned on me, until very recently, that Zacharias… even faced as he was with the terrifying countenance of an Angel of God Almighty… doubted the truth of his words. Even INSIDE the Temple, standing next to the Altar of Incense as he offered up incense to God!
Seriously?
All of Gabriel’s words spoke to FUTURE events, not present events. Zacharias was going to have to go from that place, be with his wife in the proper time, conceive John, and watch nature take its course for the next nine months.
But that wasn’t good enough for Zacharias. He says, “how will I know this for certain?” (We know italicized words are inserted by editors.) So he wants to know, right here, right now, why he should believe Gabriel. Waiting apparently isn’t good enough. (We know for certain that the issue is doubt, because Gabriel tells us that.) Zacharias is rendered mute until all was fulfilled “because you did not believe my words, which will be fulfilled in their proper time.” [v. 20]
Zacharias needed to know these things were true before he was willing to do his part. Clearly, his part in this miracle would be of crucial importance. It was he and Elizabeth who needed to conceive this child. But before he would go to that trouble, before he would dare go communicate this to Elizabeth, before he would risk Elizabeth’s heartbreak, disappointment, or disgrace… he had to have a sign. He had to KNOW this was true, before he could obey.
Gabriel gives him an unmistakable sign of his authority and power, using his words alone to stop all words for Zacharias until the truth was borne out.
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So what is different about Mary? She, too, asks a “how” question.
The difference is that her question is one of “means”, not “verification”. She was perplexed at the appearance of Gabriel, not terrified. Gabriel declares the upcoming conception, birth, and kingship of Jesus, and Mary does not express doubt at the announcement. Rather, she asks how this is to come about, what is she to do? She knows she is virgin. Is that to change for this miracle? How should she obey the will of God?
Gabriel responds to the “how” of the question… that “The Holy Spirit will come upon you, and the power of the Most High will overshadow you; and for that reason the holy Child shall be called the Son of God.” [v. 34-35] (By the way, that word “overshadow” only appears 5 times in the New Testament. Once here; then three times referring to the Cloud around Jesus, Moses, and Elijah in the time of the Transfiguration that came upon (and terrified) Peter, James and John, from which came the Voice saying “This is My Son, My Chosen One; listen to Him!”[Luke 9:34-35]; and third when Peter’s shadow heals the sick [Acts 5:15].)
Unsolicited, Gabriel offers Mary the sign of Elizabeth’s pregnancy. Mary yields unconditionally to God’s will and embraces Gabriel’s words, the hurries off to aid Elizabeth in her first pregnancy. Isn’t it interesting that Elizabeth had only “come out”, publicly acknowledging her pregnancy in the month before Mary’s arrival? No way was Elizabeth going to endure the risk of disappointment had she miscarried, or been merely deluded into thinking she was pregnant. She would not face either the jibes or the condescending looks of other village women as her face began to round and her figure became more full. She was an elder of her town, disgraced by the curse of barrenness perhaps, but nonetheless righteous and dignified of demeanor. She would not be mocked.
But by the time Mary arrives, Elizabeth KNOWS. She knows for sure that she carries life within her. The baby has quickened, and for the first time she has the glorious sensation of life moving inside her as he responds to her motions or sounds around them. No words describe the joy of hugging new life with your very self, as a woman can in this time.
Mary comes, calls out in greeting, and the Holy Spirit already filling John [v. 15] now fills Elizabeth as well, and her joyful encounter with Mary as they attend to one another’s needs for the next three months (Elizabeth’s third trimester, Mary’s first), offers blessing to them both. Even as I type those words, I can only pause and wonder in awe at what those months must have been like. What would evenings have been like in such a home? Zacharias silent (no choice there), Elizabeth growing ever more excited even as getting around gets more difficult and stilted, and Mary finding her appetite less predictable, perhaps napping now and again, and sensing the changes in her body as the Christ waxes in form…
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What does all this mean to us, Gentle Reader?
Well, God does the impossible all the time. For those who are ready and seek Him, miracles are all around.
When they come, sometimes they are hard to believe in. That’s just the truth. But! When one is willing to yield to them, God grants. When one is willing if and only if there is a sign attesting to the truth… well, God accommodates and a sign will be given. We see this over and over again throughout the Scriptures (Gideon, etc.) However, as we see from this text, while faith that may be, it is a flawed sort of faith. (I, for one, have engaged in such flawed faith countless times, so no judgment here!)
But there’s another kind of faith. There’s a faith that takes a truth on the authority of the speaker, and simply says “Yes!” before it asks “How?”
There, I think is both the difference between the two Gabriel missions, and the significance to us today.
Zacharias wanted proof before he would act. Mary was willing to act before any proof was offered.
Both were engaged in astonishing blessing and miracle. Zacharias just had to go about it with a bit more inconvenience. That and, frankly, their lingering doubts certainly would have robbed him and Elizabeth of months of joy and consolation.
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The Holy Spirit, the overshadowing Power of the Lord Most High, certainly wins out in every miracle. Let us simply say “Yes!” first, ask “How?” afterwards, and watch events unfold!
Grace to you, Gentle Reader!