in 1266 he had begun the Summa and the De anima commentary. In 1268-72 he stayed for a second time in Paris.
Von Franz situates the composition of Aquinas's Summa within a biographical and psychological framework, treating it as the intellectual pole against which the visionary crisis of the Aurora must be understood.
, Aurora Consurgens: A Document Attributed to Thomas Aquinas on the Problem of Opposites in Alchemy, 1966thesis