Hekiganroku: Ummon's Staff Becoming a Dragon

In this Teisho, given on March 2nd, 2025, the final day of No-Rank Zen Temple's Spring Odayaka Sesshin, Rinzan Osho examines case 60 of the Hekiganroku: Ummon's Staff Becoming a Dragon. The staff has swallowed up the universe, where are the mountains, rivers and the great world?