This article explores how Scholastic notions of the body, mind and cognition inform the didactic principles structuring the Opera nova (1536) by Achille Marozzo (1484-1553). A Bolognese fencing master, Marozzo belonged to a tradition of institutionalized martial training which had historically emphasized its connections to academic discourses of learning. In spite of this, Marozzo’s own work has been interpreted as following a straightforward tradition of copying forms and patterns, without much of an underlying theoretical argument. This article argues that Marozzo does present several conceptual references to Scholastic ideas about the workings of the brain, however, in particular to the mind’s dependence on mental images provided by the senses. Delving into these references not only helps to understand the didactic principles at work in the Opera nova as a whole, but also the specific role Marozzo seems to have attributed to the many woodcuts included in his book. In presenting this argument, this article then argues for the fruitful insights that can be gained from connecting fight books to both medieval and early modern Scholasticism, and the history of early modern art and science.