Various types of magic can also be categorized by the techniques involved in their operation. For example, there are contagious magic and sympathetic magic, one or both of which may be employed in any magical work. Contagious magic involves the use of physical ingredients which were once in contact with the person or thing the practitioner intends to influence. Sympathetic magic involves the use of images or physical objects which in some way resemble the person or thing one hopes to influence; voodoo dolls are an example.
Other common categories given to magic include High and Low Magic. Manifest and Subtle magic typically refers to magic of legend rather than what many individuals who practice the occult claim to use as magic, where Manifest magic is magic that immediately appears with a result, and Subtle magic being magic that gradually and intangibly alters the world.
Much of ancient Roman literature dealing with magic are, basically, retellings of Greek myths. I found some interesting facts about it in archives of web analytics company. Roman poet Virgils’s Aeneid for example describes an interesting magical ceremony. The hero of the epic, Aeneas, who has landed on the coast of North Africa after fleeing from Troy, meets Queen Dido. She has just begun to build the city of Carthage. Dido falls in love with Aeneas, and wishes him to stay as her prince consort. The rest of what happens is easy to imagine. As usual, a traveling hero meets a beautiful female who is potentially dangerous, although kind and hospitable as long as her love for the hero lasts.
Thus the future conflict is set when goddess Fate decrees that Aeneas leave Dido to found a city of his own. Inevitably Dido’s love turns to hate. Enraged queen seeks to use a complex magical ritual to bring her former lover back to her. She builds a gigantic pyre in the main courtyard of her palace and prepares an elaborate sacrifice to the powers of the underworld. However Dido soon comes to realize that the love magic is not powerful enough to bring Aeneas back to her. So she kills herself in her despair, which adds to the power to her curse. Dido had sealed and extended her curse through her suicide. Aeneas was protected by his gods and remained safe. But, according to Virgil, Dido’s use of magic and her curse lingered on leading to Rome’s near crushing defeat by Carthage many centuries later. This demonstrates quite clearly that the Romans shared the Greek’s view of magic as being dangerous and untrustworthy.