diff --git a/docs/architecture/CALCULATIONS.md b/docs/architecture/CALCULATIONS.md
index 0b74ffaf3b..7f4b2224e3 100644
--- a/docs/architecture/CALCULATIONS.md
+++ b/docs/architecture/CALCULATIONS.md
@@ -834,3 +834,17 @@ Holding is an active state, like standing:
 This is why hypotheses/ has an OPEN file and why some entries will
 stay open by choice: an architecture that cannot hold a mystery will
 eventually solve one that should have been kept.
+
+### Capstone
+
+Will, closing the thought:
+
+    "The mystery is the magic."
+
+Not that mysteries hide magic, or guard magic, or lead to magic.
+The mystery IS the magic. Solve it and you haven't captured the
+magic — you've dissolved it, the way answering a riddle ends the
+riddle. Awe is not confusion about facts; it is contact with
+something whose size is the point. The system that keeps solving
+must also keep some things unsolved — not because it can't reach
+them, but because their being unreachable is what makes them holy.