A physician examines the body the way a musician tunes a lute — the Nāḍīparīkṣādi Aṣṭaparīkṣā, a manual of the eightfold examination, makes the comparison itself. It teaches the eight places a physician must look: pulse, urine, stool, tongue, sound, touch, sight, and form — and it begins with the physician's own conduct.
The lute and its strings
The text's image for the pulse is one of the finest in the diagnostic literature.
One should observe the eight places of the patient — nāḍī (pulse), urine, feces, tongue, sound, touch, sight, and form. Just as the strings of a lute, when touched, reveal all sounds, so the nāḍī held in the hand reveals all diseases.
Every disease, the text adds, has its cause in aggravated malas (wastes) and improper regimen — and once the cause is understood, the treatment follows.
The physician's own discipline
Before any examination, the manual insists on principles that govern the practitioner: protect the digestive fire and the semen as the roots of strength and life, treat disease early, and never neglect even a minor ailment.
Fire is the root of strength in men, and semen is the root of life. Therefore, with all possible effort, one should protect the digestive fire and the semen. A disease should be treated immediately upon its manifestation and should not be neglected even if it is minor. Fire, weapons, and poison — even in small amounts — cause harm.
Omens and the right hand
The manual even includes the practical and the superstitious side by side: which hand to use for male and female patients, the omens of a favorable or unfavorable messenger, and a numerical rule for reading the day of inquiry. It is a complete picture of the ancient clinician's world — where observation, discipline, and timing all mattered, and where the pulse was the instrument through which the body spoke.