In 2018 the lowercase word zen entered the dictionary as a synonym for peaceful and calm, but the historical tradition is far more radical and demanding than a desktop sand garden suggests. This episode follows the word from the Sanskrit dhyana to the Chinese Chan to the Japanese Zen, and explains how Indian Mahayana Buddhism collided with Chinese Taoism during the Tang dynasty to create what was also called the Buddha Mind school.

We unpack the core premise that everyone already possesses an enlightened mind obscured by defilements, the practice of zazen and no-mind, and why Zen masters turned to paradox and koans like Zhaozhou's Mu to short-circuit conceptual thinking. Then we trace the messy institutional history: the four eras mapped by historian John McRae, the anti-Buddhist persecution of 845 that rural, self-sufficient Chan survived, ...