Robert Louis Stevenson (public domain pic from Wiki Commons)
In ‘A Christmas Sermon’, a short public domain text available on Wikisource, Robert Louis Stevenson meditates on the holiday season, death, morality and man’s main task in life: “to be honest, to be kind… to make upon the whole a family happier for his presence.”
‘A Christmas Sermon’ appeared in a collection of essays entitled ‘Across the plains: with other Memories and Essays’ (1892) and was written, along with The Master of Ballantrae, shortly after Stevenson’s father had passed away and while Stevenson himself was recovering from a lung ailment at Lake Saranac, New York, in the winter of 1887.
More openly-licensed Christmas texts can be found at Wikisource’s Portal:Christmas including Is There a Santa Claus? (1897).
Wikisource, the hyper library hosts over 340,000 out-of-copyright longer texts (plays, poems, short stories, novels, letters, speeches, constitutional documents, songs & more) as demonstrated by the range of texts on Robert Louis Stevenson’s page here.