  In the wake of an article of Anne Sheppard (1982), scholars usually distinguish between three kinds of theurgy in Proclus. The first kind, as described in the above quoted treatise On Hieratic Art, was mainly concerned with animating statues (in order to obtain oracles or to evoke divine apparitions) or, in general, with activities related to physical phenomena or human affairs (influencing the weather, healing illnesses etc.) (see Life of Proclus § 28–29). As emerges from our sources, it is this kind of theurgy that involved much ritualistic practice, including hymns and prayers. The second kind of theurgy makes the soul capable of ascending up to the level of the hypercosmic gods and the divine intellect. This second kind too operates by means of prayers and invocations and it seems especially characteristic of Proclus’ Hymns. And finally, the third kind of theurgy establishes unity with the first principles, that is the One itself. This third kind corresponds to the level of the highest virtues (i.e., ‘theurgic virtues’) in the scale of virtues. It is not clear whether some form of ritual is involved here at all. For this last stage of the Platonic homoiôsis theôi the following elements are of major importance: negative theology (culminating in the negation of the negation), mystic silence and the intriguing notion of faith (pistis), which thus enters with a non-Platonic meaning - though even for the latter notion Proclus will search for confirmation in the Platonic dialogues.