December 3

The powers of the sympathetic nerve are neither entirely physical nor spiritual, but are between the two (systems).  The nerve is connected with both. Its phenomena shall be perfect when its spiritual and physical relations are normal.

When the material world and the divine world are well co-related, when the hearts become heavenly and the aspirations grow pure and divine, perfect connection shall take place. Then shall this power produce a perfect manifestation. Physical and spiritual diseases will then receive absolute healing. 

- ‘Abdu’l-Baha  (Tablets of ‘Abdu’l-Baha, vol. 2)