The term “idea” can be used to refer to a specific kind of act or operation of the mind—here, it is the act of representing. In this sense, the idea is simply an existent mode of the mind. In light of the formal-objective reality distinction, since the formal reality of an idea (a mode) is derived from the formal reality of the mind (its substance), it follows that its level of formal reality cannot be greater than that of the mind. This is what Descartes means when claiming that his ideas, unde