Abstract

In In I Sent., d. 2, q. 1, aa. 1-3 Thomas Aquinas deals with divine simplicity and the predication of the divine attributes. There, he seems to take some distance from Avicenna, specifically when Avicenna avers that God lacks a quiddity. However, in the Summa theologiae Aquinas assumes, as he previously does both in In I Sent., d. 8, q. 1, a. 1 and in De ente et essentia, that there is an identity between the essentia/quiddity and the esse in God, while this statement would also be held by Avicenna. I will show how back to the Commentary on the Sentences Aquinas has detected the existing tension between the two thesis held by Avicenna, and I will also analyze the way in which he addresses both these theses.