While at the Santa Sabina studium provinciale Thomas began his most famous work, the Summa theologiae ,  which he conceived of specifically as suited to beginning students: "Because a doctor of Catholic truth ought not only to teach the proficient, but to him pertains also to instruct beginners. As the Apostle says in 1 Corinthians 3:1–2, as to infants in Christ, I gave you milk to drink, not meat , our proposed intention in this work is to convey those things that pertain to the Christian religion in a way that is fitting to the instruction of beginners."  While there he also wrote a variety of other works like his unfinished Compendium Theologiae and Responsio ad fr. Ioannem Vercellensem de articulis 108 sumptis ex opere Petri de Tarentasia ( Reply to Brother John of Vercelli Regarding 108 Articles Drawn from the Work of Peter of Tarentaise ).  In his position as head of the studium Thomas conducted a series of important disputations on the power of God, which he compiled into his De potentia .  Nicholas Brunacci [1240–1322] was among Thomas's students at the Santa Sabina studium provinciale and later at the Paris studium generale . In November 1268 he was with Thomas and his associate and secretary Reginald of Piperno , as they left Viterbo on their way to Paris to begin the academic year.  Another student of Thomas's at the Santa Sabina studium provinciale was Blessed Tommasello da Perugia.