In religio-mythology, Tenet (NE:660), the word at the cross of the Sator square, translates as: flame / fire, with the secret name: birth / child, code for the bennu bird, aka phoenix (Herodotus, 450BC), is a Latin letter cypher of the Heliopolis creation myth (see: creation myth), wherein "N" represents the Nun, "E" represents the sun, born out of the Nun, and "T" renders as a Latin shorthand for the Egyptian theta, symbol "" the Greek symbol of the sun god + the Ouroboros (Apep) and or the Ennead, generated from the former two, which generates all else.
The word "tenet", is from the Latin tener, meaning a thing or belief one "holds, grasps, keeps, have possession, maintains", in the mind. Crudely, accordingly, the word "tenet" meaning, in the present sense, as one's set of principles, and the Sator square era meaning of "tenet", must align in some sense? We would intuit, therefore, that the Greco-Romans of this period (50AD) employed the Tenet cross as a sublimed belief, akin to a Jesus "cross-like" symbol (or the Egyptian ankh), that that the sun was born out of a void (or vacuum), and from this all things derived. This "belief" system, or set of "tenets", remained god-based (theos-based / Θ-based) for some time.
In the 16th century, beginning with the Vinci engine (1508), however, people began to "experiment" with vacuums, to see if they could exist or not. Note that the words engine and experiment, not to mention the words "experience", "energy", "entropy", "existence", etc., start with the letter "E", by no coincidence. The apex of this, occurred when Hooke stated the phenomena of work produced from vacuums as a scientific principle:
- “The ‘vacuum’ left by fire lifts a weight.”
- — Robert Hooke (1675), Description of Helioscopes and Other Instruments
In other words, the generation of the "vacuum" itself, can do the "work", i.e. lift the weights, or move objects through gravitational height, or through electromagnetic fields, to engender all of "creation", as putting things together was formerly called, or "synthesis" as we now defined things.
In the two centuries to follow Hooke, the new vacuum-based science of thermodynamics was the result. In this new science, there remained no "gods" in the vacuum of thermodynamics. This left humankind with the ultimatum: "believe in god" or "believe in entropy" as Ben Carson explained things (see: quote) in his 2015 US presidential campaign.
Tenet | Film
- See main: Tenet (film)
In 2020, Christopher Nolan released the film Tenet, which became the blockbuster film of 2020. In respect to the choosing the title, Nolan commented as follows:
- “I usually have an ‘idea’, in respect to the title of a movie. In the case of Tenet, I had the title in mind very early on, in fact years ago. The fact that it was a palindrome was the jumping-off point. It was also what the word means, the notion of ‘belief’.”
- — Christopher Nolan (2020), “On Tenet: Full Interview”, Dec 21 
Nolan elaborates that we are all sort of "imprisoned", each in our own way, in respect to our own views, the passage of time, what's going on in the world, etc., which leads to a "leap of faith", so to say, in "objective reality". This, Nolan, says plays out in terms of the "belief" or "faith" in which each person (or character) "chooses" to invest in, on screen, and in reality.
The following are quotes:
- “A tenet is a synonym for axiom, one of the principles on which a belief or theory is based.”
- — Jnothman (2006), “definition offered by User:22.214.171.124 on talk page”, Wikipedia, Jan 8 
- Thims, Libb. (2020). Human Chemical Thermodynamics — Chemical Thermodynamics Applied to the Humanities: Meaning, Morality, Purpose; Sociology, Economics, Ecology; History, Philosophy, Government, Anthropology, Politics, Business, Jurisprudence; Religion, Relationships, Warfare, and Love (§2: Alphabet) (pdf) (§36: Joule [§§36.1: | E = Sun (etymology)]). Publisher.
- Heliopolis creation myth – Hmolpedia 2020.
- Tenet – EtymOnline.com.
- Da Vinci Engine – Hmolpedia 2020.
- Nolan, Christopher. (2020). “On Tenet: Full Interview” (interviewer: Geoff Keighley) (Title choice, 0:35-2:00), Cortex Videos, Dec 21.
- Tenet (disambiguation) – Wikipedia.