In his book “An Introduction to Zen Training”, Rinzai Zen teacher Omori Sogen described the role of strength in the lower abdomen in the practice of seated meditation:
In the Yagyu-ryu (a school of swordsmanship), there is a secret teaching called “Seikosui”. Yagyu Toshinaga, a master of the Yagyu-ryu, taught ...


In an article titled “Moving from the Source: Riffs on True Embodiment”, Corey Hess wrote:
From an email to Karan Vasudeva, author of the article