When the whole body is in an optimum situation, the transformation of matter and energy inside the body is in relative balance, and hence the manifestation of the tongue should be normal and in good scenery, imagined as a landscape surrounded by mountains, with a plain and river in it. The image of a normal tongue is U-shaped, the surrounding area rises gently, and the middle part looks flat, indicating a perfect condition of the matter and energy inside the cells. A moist but unsticky coating indicates that there is enough fluid in the body. Therefore, any changes in the energy circulation will be reflected on the tongue coating.
