: Historically, practitioners distinguished between theurgy (high magic aimed at spiritual union with the divine) and goetia (low magic involving the evocation of spirits or demons for material tasks).
Successful evocation requires meticulous preparation and the use of specific "magical weapons" and formulae. The Lesser Key of Solomon Ceremonial Magic & The Power of Evocation
The fundamental principle of ceremonial magic is the use of and directed intention to influence the unseen world. Ceremonial Magic & The Power of Evocation