Around the world, different systems of medicine have a name for what in Naturopathy we call the Vital Force - that which animates the body. Traditional Chinese Medicine call it Qi (Chi), Ayurvedic medicine call it Prana. Other terms from other cultures include: Ki; Pneuma; Mana; Ruah.
Today, you may hear it described as our Innate Intelligence or in the scientific literature as the human biofield.
Qest4 is a device that acts as an interface between the practitioner and the patients innate intelligence, bypassing the conscious mind and connecting directly to the system/body. It does this by acting as a harmonic oscillator, sending and receiving frequencies or bands of frequencies (termed signatures) and in doing so sends and receives information to and from your body. It does not diagnose, it adds additional information for the practitioner to consider in the larger context of the case.
Atoms can also be described as harmonic oscillators, every atom in your body is constantly oscillating (vibrating), even at rest, sending and receiving information to the neighbouring atoms and cells and tissues and so on. Frequency is the measure of these oscillations seen in waves of energy as it is transferred from one atom to another.
Physics gives us language to, as best we can, understand the world around us. The first law of thermodynamics, the law of conservation of energy helps us to understand the nature of energy. Energy can neither by created nor destroyed, only transformed and transferred. When fast moving atoms collide with neighbouring, slower moving atoms, they transfer their kinetic energy to them, causing the slower atoms to speed up. Like running at pace into a stationary person, the force (transfer of energy) you exert on them when you collide can't help but knock them off balance as you bowl them over. The vast majority of our energy is transferred to us from the sun, transformed into chemical energy within plants which we and animals eat and is then in turn transformed into potential and kinetic energy within us.
We use different words to describe different forms of energy such as light, sound, kinetic, potential, chemical, electrical, thermal, nuclear, gravitational. This gives us context but doesn't change the nature of energy which is always moving from one moment/position/form to another and therefore can be considered connected to all things at all times. We are all the same, one way or another.
We, and the world around us, are made of matter. The physical representation of ourselves, we have mass, are solid, we occupy space. And by the definition of the theory of relativity, we are also energy. E=mc2, two forms of the same thing that coexist at the same time and one can beget the other.
Energy and frequency are also directly and proportionally related. E=hf or energy = Planck's constant x frequency, one cannot exist without the other. The higher the frequency, the higher the energy and conversely true, the lower the frequency the lower the energy.
Matter, energy, and frequency are all interconnected, we are all of these things and so, just as we can use physical medicines to aid the body to heal itself we can also use energy or frequency medicines. Healing can and does occur on multiple planes from emergency medicine and pharmaceuticals, physical therapies, herbal extracts and nutritional's, through to psychology, Spiritual practices, homoeopathy and beyond.
But at the end of the day, as BJ Palmer described it best: "The power that made the body, heals the body" sometimes we just have to get out of the way.