Paul Tillich, Thirteenth Century: Joachim di Fiore, Franciscan theology, Dominic

The dynamics of the high Middle Ages are determined by the conflict between Augustine and Aristotle, or between the Franciscans who were Augustinians and the Dominicans who were Aristotelian. But don’t take this too exclusively. Very often I warn you about making too sharp divisions. And here again all medieval theologians were Augustinian in substance. And all of them since the 13th century were Aristotelians with respect. to the use of their philosophical categories. In this sense the duality is limited. But in another sense, in the sense of an emphasis, it is a very important division, a division which is effective in all our philosophy of religion today, even in the most modern ones, who would not even know they do things which these old”primitives” of the 13th century have done – and I don’t believe they are as primitive as most philosophers of today are, but they are considered to be such.
Paul Tillich, A History Of Christian Thought – Table of Contents