They have been empowered to heal through the spirit of a divine being, which takes possession of the healer's body through a trance.
Fidencist healers are the ones who receive the spirit of Niño Fidencio. These are called boxes, glasses or materials, because they are considered the container or means by which certain spirits take possession of their bodies to carry out cures, they can also be possessed by the spirit of the Holy Child of Atocha, Pancho Villa, the Aurorita girl and even that of a gypsy.
Many subjects possess this gift from birth and others acquire it during a dream or vision. Depending on the spirit that takes possession, it regulates the behavior of each matter, behaving like the original character.
Possession occurs through a trance and along with it come the healing powers. The most recurrent healing methods are rubbing with lotions, the recipe for infusions, physical contact and sweeps or branches.
Some subjects get to practice small operations using rudimentary instruments, such as pocket knives or glass of bottles. These characters are also the guides of their religious missions. Fidencism is considered a religion.
