Origin is a religion created by the Ori after their Ascension, preached by Priors to all human followers. It claims that the Ori are the creators of all life in the universe, and their will is shown in the religious text, the Book of Origin. (SG1: "Avalon, Part 2", "Origin")
The primary religion that appears to dominate the Alteran Home Galaxy is one that is imposed on all humans and is also known as the Path of Origin. The promise provided by the Ori was that they are guiding humanity down the path of enlightenment, which would lead to their Ascension. Statements made from the Priors and the Book of Origin state that the Ori are willing to reveal the secrets of the universe itself to those who follow them. Those who deny this faith are simply destroyed for they are evil.
This was eventually revealed to be a false promise by Orlin. The reason for the religion was simply for the humans of the universe to surrender their free will to the Ori, which in turn produced a form of energy for the ascended beings and provided them strength. This was the reason why the Ancients themselves believed in a policy of non-interference. Origin's true purpose was to provide the Ori with enough energy to eventually destroy the ascended Ancients. Adria had admitted as much, but claimed that this was how the Ori ascend their followers. (SG1: "The Fourth Horseman, Part 1", "The Fourth Horseman, Part 2", "The Shroud")
The Ori themselves do not hesitate in demonstrating their powers to show their divinity to their followers. It was stated on numerous occasions that the Ori do not require blind obedience from their followers and will show them their power through various feats that the Priors are easily capable of accomplishing.
After the downfall of the Ori, Tomin decided to nevertheless adopt Origin, with modifications, as a legitimate religion for his people, after focusing on its philosophy helped him endure torture, Vala agreeing that the essential ideas of Origin were good regardless of how it began. (SG1: "The Ark of Truth")
- "We are mere mortals…we cannot begin to question those with the knowledge and understanding of the infinite universe… if a few Jaffa must give their lives so that all Jaffa from now until the end of time can find true enlightenment…then who are you to stand in the way?!"
- ―Prior speaking to Gerak[src]
The followers of the word of Origin consists primarily of Humans in the Alteran Home Galaxy who were at a primitive level of development. After their discovery of the Milky Way galaxy, the Ori told their followers to prepare a great army that would convert the unbelievers to the new faith. Many civilizations in the Milky Way fell under the religion; some willingly while others were forced to do so after a demonstration by the powers of the Priors. Even Jaffa began to fall under the belief of Origin when Gerak was converted to the belief of Origin. This also led to the development of a group within the Free Jaffa Nation known as the Illac Renin, who were devoted to the teachings of Origin. The Sodan themselves also followed Origin for a brief period of time. (SG1: "Avalon, Part 2", "Origin", "Babylon", "The Fourth Horseman, Part 1", "The Fourth Horseman, Part 2", "Talion")
Those who refuse the path of Origin are destroyed as a demonstration to others on what fate awaits them should they deny the enlightenment provided by the Ori. The Ori and their followers show no hesitation in destroying people in order to convert them.
The symbolism of Origin was based around fire which provides warmth and light. Interestingly, on Earth, and possibly other Milky Way planets, fire is associated with demonic images and damnation, which Dr. Daniel Jackson suggested was perhaps introduced by the Ancients as a form of protection from the Ori.