from Priest, Priestess: Preost, Prestar, Prestere from Latin Presbiter (Elder), from Greek Presbyteros (Older), One who leads the Cow (pres – “before” + root of bous “Cow” - symbol of Nature).
Priest, Priestess, therefore means a Theurgist, someone who dominates Nature, a Buddha, an Illuminated One (Gautama the Buddha or Gotama literally means the conductor of the Cow) Every True-Priest/Priestess is a Cowherd, a conductor of the Cow, a Priest/Priestess of Nature (a Magician, a Theurgist).