Linus says to Charlie Brown in a Charlie Brown Christmas from 1965 this biblical verse:

And the angel said unto them, Fear not, for behold, I bring unto you good tidings of great joy, which shall be to all people. For unto you this day is born in the City of Bethlehem, a Savior, which is Christ the Lord. And this shall be a sign unto you; you shall find the babe wrapped in swaddling clothes and lying in a manger. And suddenly there was with the angel, a multitude of the heavenly host, praising God, and saying, 'Glory to God in the highest, and on Earth peace, good will toward men'". That's what Christmas is all about, Charlie brown