The best moment of the show is when Charlie Brown's frustration peaks; he can't stand the commercialization of the holiday and screams out: "Isn't there anyone who knows what Christmas is all about?"
"Sure, Charlie Brown," Linus calmly answers, and takes the stage: "I can tell you what Christmas is all about: ...And there were in the same country, shepherds, abiding in the fields, keeping watch over their flock by night, and lo, the angel of the Lord came upon them. And the glory of the Lord shone round about them. And they were sore afraid.
And the angel said unto them, "Fear not, for behold, I bring you tidings of great joy which shall be to all people. For unto you is born this day, in the city of David, a Savior, which is Christ the Lord. And this shall be a sign unto you. Ye shall find the babe wrapped in swaddling clothes, lying in a manger."
And suddenly there was with the angel, a multitude of the heavenly hosts praising God and saying "Glory to God in the Highest and on Earth; Peace, Goodwill Toward Man."
That's what Christmas is all about Charlie Brown!" (ah! ...from the mouths of babes!)