This chapter is on concept empiricism and its historical antecedents, in particular, Aristotle's view. Concept empiricism is an empiricist thesis in the philosophy of mind, a thesis which claims that the capacity for thought depends on perception. More specifically, it is a claim about concepts, which are the constituents of thoughts and that in virtue of which thoughts have their content. Concept empiricism claims that all concepts derive in some sense from perceptual experience. I focus on how contemporary versions of concept empiricism – in particular those defended defended by Jesse Prinz and Lawrence Barsalou – compares with the kind of concept empiricism we can find in Aristotle.