In Middle Platonism, the chasm between a transcendent, hyper-cosmic divine and the messy, sublunary world posed a significant philosophical problem. Standard Stoic pneuma-theory offered a continuum, but for Platonists like Plutarch, this wasn't enough to safeguard divine impassibility. His solution, articulated across the 'Moralia', was to systematize and elevate the daimon into a structural lynchpin of his metaphysics. This move was not without precedent. Plutarch heavily inherited the ontological framework from Xenocrates, a student of Plato and the third head of the Academy, who first proposed a tripartite division of rational beings: gods, daimons, and humans.

Plutarch refines the Xenocratean model, transforming it from a simple cosmic census into a dynamic hierarchy. In his view, these are not just distinct classes of beings but represent a spectrum of spiritual potential. The key is the composition of the soul itself. He proposes that a human being is a composite of body (soma), soul (psyche), and intellect (nous). The combination of body and soul makes a 'human,' while the combination of soul and intellect makes a 'daimon.' Gods, in their pure form, are intellect alone, unburdened by the passions of the soul.

This structure has profound implications. A soul can ascend or descend. Virtuous souls, upon the death of the body, become daimons. These daimons continue to be purified until their soul-element is shed, allowing their intellect to ascend to the status of a god. Conversely, some daimons can become too entangled in worldly affairs and fall, becoming reincarnated in human bodies. The daimon is therefore not a fixed species but a crucial transitional state, a

In De Genio Socratis, Plutarch uses this framework to explain Socrates' personal daimonion. This isn't a generic divine voice, but a specific, assigned guardian daimon—a higher soul—tasked with guiding Socrates. This daimon communicates not with Socrates' own soul (psyche), which is susceptible to passion and disturbance, but directly with his intellect (nous). This explains the instantaneous and non-discursive nature of Socrates' divine sign.

This individualistic assignment moves beyond the more diffuse Stoic concept of divine pneuma. Plutarch's daimons are localized agents, acting as personal metaphysical tutors. They bridge the gap by translating the silent, pure thought of the divine into something receivable by a human intellect, bypassing the noisy filter of the embodied soul. To exist and interact within the sublunary sphere, these daimons require a mode of transport. This brings us to the concept of the pneumatic vehicle or 'ochēma-pneuma'.

The ochēma is a luminous, ethereal 'body' made of the finest air or aether, which allows the disembodied soul or daimon to traverse the lower cosmos. As described in De Defectu Oraculorum, these vehicles are not immortal. They are subject to a 'second death' where the ochēma itself dissolves, releasing the intellect to its final, bodiless state. This pneumatic body is what allows daimons to influence the physical world, oversee oracles, and interact with mortals. It is the final link in the chain, a quasi-material shell that allows the utterly transcendent to have a functional, albeit indirect, presence in the material world. Plutarch's demonology thus provides a robust and elegant solution to the problem of divine mediation, creating a cosmos linked by a great chain of spiritual beings.

Time for a quick review of these concepts.