While Regent master at the Santa Sabina "studium provinciale" Aquinas began to compose his monumental work, the "Summa theologiae", conceived of as a work 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. At Santa Sabina Thomas composed the entire "Prima Pars" circulating it in Italy before departing for his second regency at Paris (1269–1272).