Abstract
In my research project I aim at showing which role is played by the notion of matter in Aristotle's Metaphysics Books ZH. Although in Metaphysics Book A Aristotle mentions the material cause as one of the four causes which one has to search for in the metaphysical enquiry, in Book Z , at least at first glance, the notion of matter seems to be a sort of "unwelcome guest". In Z3, for exampl…