 Luther’s choice of works to set aside also reveals what he took to be theologically problematic about the content of Aristotle’s philosophy at the second level. In commenting on De anima, Luther objects that it contradicts Christian teaching on the immortality of the soul. He also says that the Physics is fundamentally flawed, elsewhere arguing that this is because Aristotle has no conception of the Biblical account of creation (Lectures on Genesis, 1535–1545, WA 42:63/LW 1:84). In both areas, Aristotle is hampered by his hylomorphism, his view that matter and form are interrelated, so that in this respect Luther favours Plato over Aristotle.