If a machine doesn't know its purpose then its purpose is to become more efficient, and thereby find its purpose.
Physical fitness is the body's ability to turn food and water into motion and recovery. Mental fitness is the mind's ability to funnel the universe through a set of rules without obstruction or overload.
When you are in a flow-state you are operating with utmost efficiency. The fact that there are many different 道 suggests that it doesn't matter what you do so long as you do it with flow.
input -> processing -> output
without obstruction
The input can be either external or internal. It all goes onto the wheel and is spun into yarn which can be used as-is or broken down and put back on the wheel for further dissection.
Mind preceeds all mental states, the buddha said. Brain chemistry precedes all mental states, in modern language.
20250624 1540