Around the second century AD, abracadabra appeared in the poem, De Medicina Praecepta by Quintus Serenus Sammonicus, a physician that believed that if an ill individual wore the inscribed incantation on parchment around the neck, the individual would be cured of illness . The amulet was one of the most popular in the medieval period. Symbolically, the inverted triangle is an inversion of the cone of power. A cone of power is used to draw down energies from a higher source while an inversion of the cone of power is believed to drive out the illness from one’s body. The Roman emperor Caracalla wore the word on an amulet for protection against disease. The word was inscribed in an inverted fashion, in the shape of an upside down triangle or cone.
Modern day practitioners of magick believe that the Divine exists both within oneself as well as outside of oneself. The use of ABRA twice within the word abracadabra suggests that one is attempting to achieve an internal divine balance.