Metaphysics (Greek: τὰ μετὰ τὰ φυσικά, "those after the physics"; Latin: Metaphysica[1]) is one of the principal works of Aristotle, in which he develops the doctrine that he calls First Philosophy.[a] The work is a compilation of various texts treating abstract subjects, notably substance theory, different kinds of causation, form and matter, the existence of mathematical objects and the cosmos, which together constitute much of the branch of philosophy later known as metaphysics.
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