God is at work and Mary is the one through whom the Saviour will come, the Son of God putting on human form. It is worth taking time to reflect on the wonder of the angels words. "you have found favour with God..." God is blessing Mary, she is favoured by God. Mary is the favoured one through whom God the Son comes to show God's favour to the world.
What evidence is there that she might conceive, after all she is virgin. The angels announce,went of another miraculous pregnancy is enough to convince Mary. God's word doesn't fail, you can trust it.
Mary is humble and godly. She is not perfect but she is God's servant. She humbly accepts God's will and will play her part in God's plan even though it will not be easy for her. Mary did not live in a time where single parenthood was accepted or thought normal. There might well be more than eyebrows raised when the bump begins to grow, and what about Joseph, what would this mean for her betrothal and upcoming marriage to a righteous man?
Mary is not naive she knows that this will not be easy, she is no doubt aware of the looks she will receive and the hostility she may face. And yet God's will be done, "May your word to me be fulfilled."
Mary is a great example to us of what real faith looks like, taking God at his word and living dependent on the promises of God.