It's hard to add anything to this beautiful picture. Joseph, hearing from the angel to marry Mary, because the child is conceived of the Holy Spirit. Joseph, being given the name for the child. Jesus, in Hebrew Yeshua, translated into English Joshua, means Yahweh Saves.
Yahweh - God Himself, and God alone - saves.
This is the Gospel. Yes, this alone is Christmas. Without any decorations, plays, music, lights, meals, guests, or gifts, this one verse holds the heart of Christmas.
May we keep that focus through these next 10 days.