Agustine:On the Trinity. Books 8-15

In this treatise Augustine offers a part-theological, part-philosophical account of how God might be understood in analogy to the human mind. On the Trinity can be fairly described as the first modern philosophy of mind: as a response to that problem. Other subjects that it discusses include the nature of the mind and the nature of the body, the doctrine of ´illumination´, and thinking as inner speech.