Operating a homelab as an observant Jew raises questions that no modern operations manual addresses. Which jobs can run autonomously through Shabbat. Which alerts may wake me.
The wrong question is whether you can use a phone on Shabbat. The right question, for those of us who build the systems, is what halakhic status the work of our machines holds while we rest.
Heschel's 1951 essay distills the rabbinic conception of Shabbat into a hundred pages of philosophical-poetic prose that remains, seventy years later, the best short introduction to what the seventh day actually is. The argument that civilization conquers space and Shabbat sanctifies time is not decorative metaphor; it is the structural claim of the book, and it holds up.