Know that the human spirit is one, but it manifests itself
in various members of the body in a certain (measure or) form. The human spirit
is existent in the sight (eyes); it is also existent in the brain, which is the
location of great functions and powers; it is also existent in the heart, which
organ is largely connected with the brain or the center of the mind, and the
heart, or that center which is connection with the brain, has a distinct and
separate function, effect and appearance. In this connection, the hair and
nails have no command (nor direct feeling).
- ‘Abdu’l-Baha (‘Tablets of ‘Abdu’l-Baha’, vol. 1)
