The angel answered her, "The Holy Spirit will come on you, and the power of the Most High will overshadow you. Therefore also the holy one who is born from you will be called the Son of God.
And you can imagine the excitement of this old man, probably the only day in his life. And he probably had given up by now ever having the opportunity of burning incense. When the lots were drawn, his was that lot to burn the incense before the Lord that day.