Between some vacation, a guest preacher, and some other schedule oddities, writing and preaching meant finding some old habits. So we have a classic sci-fi reference and a story from Genesis. Which makes perfect sense when the text is the Epistle to the Hebrews.
I am preaching from Hebrews 13. 1-8 15-16, but reference Genesis 18.1-15 heavily. (Both available here.)