Przedmiot metafizyki według św. Tomasza z Akwinu w ujęciu historycznym

Evolution of philosophy before Aristotle aims at discovery of the proper subject of metaphysics (substance) and four causes of beings. Thomas deepens problem of causality to problem of efficient cause i.e. cause of existence of beings. The proper method is here separation. Departing from the standpoint of Aristotle, Thomas formulates his own theory of subject of metaphysics (ens inquantum est ens) but in a sense, the elements of his own theory he finds already in Aristotle. Moreover he argues against Avicenna (with whom he shares creationism) commenting on Metaphysics of Aristotle. Properly interpreted Aristotelism is then his own philosophy. And it cannot by otherwise: for discoverer of first philosophy is Aristotle.