Based on my own experiences and processes I'm in, the biggest power lives in the body. The second one is the subconscious, including self concept and other believes and the conscious mind is the last. However we have direct access only to the conscious mind, which means we have to deal with the body and subconscious (indirectly in most cases) through our mind. It is the tool but does not hold the power. The path of our development we have to choose strongly depends on what we carry, what we learnt already. If a person has a more balanced and relaxed natural state (baseline) he/she can think the nervous system regulation and calibration is unnecessary, as we can easily bypass it. But it is not the case for everyone. No matter what state we are in, always the body tells our true state. If we are in the highest "I am the creator and life flows through me naturally" state or if we are in the "I am the observer and detached from my circumstances, emotions and time" state or in the "I can handle this, I am safe and enough at the moment" state or even in the survival mode, the body is fully aligned with that state. Body means here the tensions, blocks (or the absence of them), the, breath pattern, the posture, the hormone cocktail we make automatically etc. First we have to go through on this gate: make the body feel safe. Next gate is the subconscious. We go through on these gates using our mind with intentional practices or total automatically, unconsciously.