The author argues that the persuasive process is articulated within a dynamic linking beliefs and emotions. The different possible states of equilibrium balancing these two aspects define a persuasive process as more inherently rational or more inherently rhetorical. This latter, being marked by an immediate emotional participation, functions within a social context of the community type. It is dominated by an aesthetic form of communication, where epistemic belief proceeds out of a conformist adherence to the ethos of the group. Its extreme form is represented by the discourse of propaganda. Linked to the epistemic structure of the rhetorical discourse there corresponds a moral structure of resentment and an authoritarian social structure. Although rational elements and emotional elements still coexist within concrete discourses, the possibility of distinguishing them in terms of autonomous functionalities represents the specific adjunct brought by philosophical reflection to the determination of the epistemic structure of persuasion.