Spirit
A spirit is a normally incorporeal personal being that inhabits the spiritual realm. The term "spirit" encompasses both the immortal spiritual beings and the disembodied souls of the dead.
Immortal spiritual beings
An immortal spiritual being, often shortened to spiritual being or immortal, is a sapient, self-aware, discrete, and self-contained entity who did not originate as a mortal material life-form. Immortal spiritual beings originate directly from Motsai. Examples include Satanael, the Watchers, angels, Yahweh, and pagan gods.
In contrast to belief systems that view immortals as abstract, formless cosmic intelligences far beyond human comprehension, Satano-Grigorist theology conceptualizes them as imperfect and personal beings who are much more similar to humans than to Motsai. Immortals are regarded as possessing finite abilities, lack the power of creation, and have their own individual wills, values, and goals. Satano-Grigorists consider over-abstraction of immortals, especially one's own deities, to be a flaw that can lead to spiritual decline. The teachings of the Grigorist Temple of Satanael encourage the recognition of Satanael and each Watcher as an individual who, just like any human, has his own unique thoughts, emotions, preferences, and flaws.
Deities
A deity is an immortal spiritual being with relatively high power who has a tendency to interact with humans in some way. This definition is vague; it leaves factors such as "higher end of the power spectrum" and "likely to interact with humans" up to interpretation. Thus, deities are a loosely defined subset of immortals, and individuals may have different personal views on whether a particular immortal is a deity or not. Examples include Satanael, Yahweh, Zeus, Freyja, Hathor, and Ogun.
Spirits of the dead
A spirit of the dead is the spirit of a deceased person. These spirits originate as mortal humans who lived on earth. Upon the death of the physical body, the soul detaches and goes forth into the spiritual realm, Napšānu, where it persists eternally in an incorporeal state.
When mutūma die, their disembodied souls are called zilūma. When nephilim die, their disembodied souls are called rephaim (Ugaritic: rapi'ūma). While rapi'ūma are generally more powerful than zilūma, the degree of power possessed by a spirit of the dead is also influenced by many other factors, especially the individual's spiritual practice during life.
All spirits of the dead are capable of interaction with other spirits in Napšānu. They can also perceive, and to some extent influence, the physical realm (Arṣu). Spirits of the dead may continue to follow deities they aligned with during their physical life, or they may abandon their past allegiances.
Power
Not all spirits are equally powerful. While the term "power" is difficult to precisely define, it can be viewed as a synthesis of several distinct naphsha-related properties of a spirit. Among these, four major determining factors stand out: baseline naphsha level, maximum naphsha capacity, efficiency of naphsha accumulation, and efficiency of naphsha use. Of course, these things cannot be experimentally measured, so one cannot quantify them; power is generally spoken of in relative terms.
Because power is a synthesis of multiple distinct properties of a spirit, speaking of power alone may not give the full picture for a very deep discussion or a thorough comparison of deities. However, it effectively conveys the general concept of varying degrees of naphsha-related abilities, and is thus convenient for the discussion of spirits.