Nature
This concept compiles all the main instances of the Greek notion of physis. In stoic philosophy, in particular, it is relevant since man's will has to be "in accordance with nature". Apart from its natural synonyms, like "whole", "universe” and "matter", we also included the instance "necessity" (translated from the Greek ananke), that the stoics intended as fatality - a cardinal concept in the creation of their philosophical word-system
Death
In this concept are included the synonymical notions of "dissolution" and "sickness" and the related ideas of "time" and "extinction". Besides, we decided to add the antithetical image of "life", since in the original text these two concepts are often correlated and the stoic philosophy considers death as a "present" from life itself.
Power
Under this category we collected all the instances related to Power, in a self-aware meaning of the term, connecting it to concepts of "governing self" (igemonia in the original Greek version), "employment" and "glory". Then, we decided to include the notions of "obstacle" and "corruption", since in Stoic philosophy these are some of the main impediments to achieving happiness, through self-empowerment.
Justice
For the stoics, Justice is one of the cardinal Virtues (aretai), intended in a moral sense of the term rather than in a legal one; because of this, we linked it to the concepts of "honor", "action" and "temperance", another of the cardinal aretai of Marcus Aurelius' philosophy. Similarly, as we did for the other classes, we added the symmetrical ideas of "blame" and "fault".
Reason
The corresponding term for reason in the Greek text is Logos. According to the stoics, it represented the universal reason and the material reasoning substance. Given this, its main instances are "judgment", "mind", "principle", "truth" (aletheia) and "reason". The last instance is the logical opposite of the macro-concept: "ignorance".
Psyche/Body
The opposition between soul and body is central to Marcus Aurelius' philosophy. As such, we decided to consider the opposition between the two concepts as a unique class. The logical instances of this conceptual class are "flesh", "body", "souls", "impulse”, and “vital spirit”; this last occurrence is the translation of the concept of pneuma in Greek, which is a force that forms matter, according to stoicism.
Providence
This concept collects the instances of the stoic idea of providence (pronoia). Its natural occurrences are "god, "fortune", "fate" (tuche), and "divinity". As last instance, we added "atoms", since Marcus Aurelius often questioned the stoic view of a word providentially ordered, considering the idea of nature being comprised of the random movement of atoms.
Stoic Calm
We decided to consider positive sentiments as instances of the class “stoic calm”, given the fact that the Stoics considered the development of inner calm (ataraxia) as one of the main virtues of the philosopher. This class collects the notions we believe are particularly charged, with such sentiment: "well-being", "purpose", "freedom" (in particular from passion), and "fortitude"; in particular, these last two instances are connected to the idea of self-control.
Stoic Trouble
This concept collects all the sentiments that, according to the stoics, represent an obstacle to reaching the stoic calm state. Examples are "displeasure", "pain", "illness" and "violence"; in particular, this last instance translates the Greek term hybris, which corresponds to the concept of "excessive pride" - one of the most terrible crimes in ancient Greek culture.
God
This class represents, on a general level, all the occurrences of God, considered not only as a conceptual figure but also as an active agent. According to stoicism, God can be identified with Nature or Reason, and is considered to be immanent, since it manifests itself in the material world.
Man
The other main abstract figure in Marcus Aurelius is Man, intended as mankind. We chose to include him alongside the God figure because Marcus Aurelius creates a certain form of dialectic relationship between this figure and the one of God - a sort of dialogue in which Man is more on the receiving side than God or Nature, to which Man must adapt.