Throughout the comedy he acquires a number of attributes which characterize four great authorities.He turns out to be a practical model of logical regulation with Aquinas (cf. Purgatorio , iii 37 and Paradiso. xiii, 112-42)and proved his scientific intellects.In Inferno (I 88) it was actually Virgil who saved Dante from the wolf of Avarice attack, instead of St. Francis and developed the Boethian principle of variability in Inferno vii, thus assumed the role of a protector. He portrays his ability of scientific arguments with Aristotle (Inferno. xi and Purgatorio xviii)
However, he seems to fulfill his main duty to implant in the protagonist ethical rationale. (Inferno. xxiv 52-7) and demonstrates an acquaintance that negative deeds are the main cause of societal turmoil. (Inferno. xi 22-3 and Purgatorio, xvii 113) (Kirkpatrick, p. 5-7) As the Hell was actually created by him Dante chose him as a guide to it. (In Book vi when Aeneas toured through the underworld to meet his father). He plays the role of white magician as well as he is known to have command over spirits and is able to manipulate them. It is evident recurrently in Inferno that he utilizes his artifice strengths.
Throughout the Inferno he stands out as a figure of humanity.