One of the Oxford dictionaries defines an overture as...."An introduction to something more substantial." Occasionally a movie is so epic that it has an overture. Doctor Zhivago comes to mind. I posted the following last year in early December....
"Celebrating the birth of Jesus in a manger in Bethlehem.....with all the wonderful hymns associated with it.....is the overture....but who walks out of a concert or film after the overture? The post concluded with this....""A baby was born....and the angels rejoiced....it was the overture....to be followed by choruses....and arias....and cantatas....and every imaginable orchestral arrangement....leading up to a grand finale that the angels are preparing for right now! So yes....Merry Christmas.....for it was a wonderful overture....but the Composer has left the greatest audiological masterpiece for the grand finale."
Handel originally intended the Hallelujah Chorus to celebrate Easter....thus it appears as an instrumental overture but the chorus appears at the end of Part Two of his Messiah with the Risen Christ. Church tradition has moved Handel's famous piece to Christmastime
We attended a Christmas concert benefit this evening. Last evening I watched....for probably at least the sixth time....the 2016 film....Risen.....that starred Joseph Fiennes as a Roman Tribune who saw Jesus dead on the cross....and then came face to face with the risen Christ! It's a marvelous film that I highly recommend!
So you may very well have a Christmas sermon tomorrow. In 2018 I wrote these words in a post...."I came across an older series of Christmas sermons by Pastor John Piper at his church in Minnesota....and I actually had to laugh....it was so wonderful....for he kept saying Christmas this....and Christmas that....but it was entirely the gospel of Jesus Christ! This pastor refused to separate Christmas from Calvary....or Christmas from the Second Coming!"
Just Google.....Messages On The Birth Of Christ, John Piper
