Humans observe two forms of life: chords (quantum spectrum, meritans, etc.) and organisms (cells, molecules, etc.), respectively from chord (tonal) observers (self-observers) and non-chord (atonal) observers (external observers), life contains chords, and organisms exist on two levels. The chord system in the human body is discovered by the chord observer (self-observer) in the form of: the meridians (chakras) system; The twelve meridians have the characteristic frequency of stimulated response, and the distribution is Equal Temperament, which is based on the same mathematical model as music and painting (n*f, H^n*f). Chords are represented on the human body as meridians (chakras); It is the chord field form of life, and it is also the chord field form of the self (Atman), which is the essence of life, subject to the natural laws of the field, and does not apply biological definitions such as life-death.