Lecture (teisho) to a Zen retreat by Paul Gerstein on 10/27/2024 in which he presents the 7th koan from the Hekigan Roku (Blue Cliff Record): "You Are Eh-Cho!" To help elucidate this terse and penetrating koan, Paul discusses a famous line from The Diamond Sutra and goes on to explore an incorrect approach to mindfulness practice that can contribute to a kind of meditation illness or "Zen sickness". Paul describes a video presentation on the origins of the universe entitled, "Everything and Nothing" and how a specific understanding of cosmology points to a profound truth at the core of what we call, "Me".