Thelema

Thelema (セレマ) is a system of philosophical law and magic, developed by Aleister Crowley.

Several important Thelemic aspects and concepts are featured in the story of Toaru Majutsu no Index, and are involved in Aleister Crowley's plan.

Principles
In 1904, Crowley traveled to Egypt on a honeymoon with his wife, Rose Kelly. While there, she entered into some kind of connection with the Egyptian god Horus. To test this, Crowley subjected her to tests involving arcane and Qabalistic knowledge of Horus, which she apparently passed with flying colors. After performing a ritual, an entity known as Aiwass dictated to Crowley for an hour. Crowley titled the result The Book of the Law, and this book would become the central tenet of Crowley's new religion, Thelema ( for will).

The central belief behind both the Book of the Law and Thelema can be summed up in three sentences from the book:
 * "Do what thou wilt shall be the whole of the Law." (汝の欲する所を為せ、それが汝の法とならん)
 * "Love is the law, love under will."
 * "There is no law beyond Do what thou wilt."

Aeons
An important concept in Thelema is that of Aeons (時代), divisions of human history named after Egyptian deities, and each characterized by certain forms of belief and expression.

There are three primary Aeons; the first is the Aeon of Isis (イシスの 時代), the time of primitive religions, before the establishment of Christianity. The second is the Aeon of Osiris (オシリスの 時代), a period in the classical and medieval centuries, believed to be one of stagnation, where humanity worshiped a single god during the spread of Christianity. The third and newest is the Aeon of Horus (ホルスの 時代) when it is believed humanity will enter a time of self-realization and self-actualization, achieving a true awakening after the downfall of Christianity.

The Aeons influence several other aspects of Thelema, such as the Thoth Tarot based around the concept and featuring The Aeon as its twentieth Major Arcana instead of . Unlike the Golden-style Tarot, in which the Major Arcana connected to the 22 paths on the Sephirot tree tell the story of the Son of God, from birth to execution and resurrection, in order to draw on a portion of his power and acquire a technique of entering the realm of god with a human body, the Thoth Tarot's Major Arcana (with different cards and a different meaning for The Hanged Man) starts at the birth of Christianity and follows it through to its destruction at Armageddon and to the new Aeon arriving afterwards, aimed at destroying the 'closed ceiling' of god's territory and bringing humanity to the next stage above it.

True Will
is a central concept within Thelema. True Will originates from within the individual and could be referred to as their "true calling." In essence, it is the idea that a fully actualized person will act in accordance with their personal drive to act according to what they truly need to do. This is differentiated from a person merely doing what they want to and is not simply a call to hedonism; instead, it is a person who surpasses the limitations of normal people by abandoning ideas of "right" and "wrong" as imposed by social norms and instead creating their own concept of morality that is true to themselves.

This concept, itself also referred to by the term Thelema in the Toaru series, forms a key part of Aleister Crowley's plans; his overall plan based on his own to proceed onwards towards his goal regardless of success or failure, and Academy City's set-up being modelled after Kamijou Touma's, in order to draw in Imagine Breaker and draw out its potential.

Entities
There are a number of deity-like figures and other similar entities which appear within the works of Thelema, a number of which are derived from other sources, such as Egyptian Mythology. These include, , , , and Choronzon.

One particularly notable entity is the being known as Aiwass, who dictated the contents of the Book of the Law to Aleister Crowley.

Other
The number is a key number in Thelema, associated with both the term Thelema itself and Aiwass, being the sum of numerical values assigned to the individual letters of certain variants of the terms via the technique of isopsephy.

Background
Thelema was devised in the early 20th century by the magician Aleister Crowley, most likely influenced by his desire to find the proper rules and answers that the god who created the world could not in order to make the world a better place, a wish which started him down the path of magic.

Like many other European magicians who had reached a dead-end in their research and sought new material elsewhere to make a breakthrough, Aleister Crowley traveled to Egypt, conveniently located just across the Mediterranean. While he was in Egypt, Aleister experimented in summoning a demon which no one had ever heard of, and incorporated the names of Isis, Osiris and Horus into his concept of Aeons, a concept which a number of people within the Golden Dawn didn't support during his time with the cabal, being considered an extreme view even within that cabal. During one of his trips, Aleister apparently used his wife who had accompanied him around the world as a medium to contact the entity known as Aiwass, who taught Aleister the secrets which he would incorporate into the Book of the Law.

After severing ties with the Golden Dawn, Aleister continued his work on Thelema. At one point, he established the Terema Sōin (テレマ僧院), however it collapsed due to a certain accident. In the present day, it forms a key part of his plan with Academy City.

Toaru Majutsu no Index
Various elements of Thelema, such as The Book of the Law, the concept of Aeons, and the entity Aiwass, are featured over the course of Toaru Majutsu no Index and play a key part in events in the story.

Shinyaku Toaru Majutsu no Index
The elements of Thelema previously referred to are referenced at various points during Shinyaku Toaru Majutsu no Index, along with certain new elements.

Kamisato Rescue Arc
When Kamijou Touma, Misaka Mikoto, Karasuma Fran and Toyama Luca examined the core of the original Anti-Art Attachment, Luca observed magical elements within the core derived from Thelema and in a trance-like state, made a link between the Temple of Thelema and the use of drugs in adolescents to induce paranormal phenomena. Luca incorporated multiple Thelemic elements into the spell she and Fran performed in order to rescue Kamisato Kakeru. Tsuchimikado Motoharu later told Fran that to Aleister, Academy City is the return of Thelema.

Aleister Crowley Arc
Various elements from the system are featured during the struggle against Aleister Crowley and the exploration of his past,     including how he used it in the set-up of Academy City and his plan.

Coronzon Arc
Numerous Thelemic elements were involved in the events surrounding the Crowley's Hazard invasion of the United Kingdom and the Ceremony of Mo Athair.