In his writings compiled under the title “The Unfettered Mind,” Takuan Soho talks about the mind that does not fixate on anything—not it’s own thoughts or intentions, not on any action of the body, nor on anything happening in one’s external environment. He says about this state “When this No-Mind has been well developed, the mind does not stop with one thing nor does it lack any one thing. It is like water overflowing and exists within itself. It appears appropriately when facing a time of need. The mind that becomes fixed and stops in one place does not function freely.”
In taiji, we practice standing post in the wuji posture. The goal of this exercise is just like that of Takuan’s “No-Mind,” but applied to the body as well.