This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
The comparative study of subtle energy concepts is largely a nineteenth and twentieth century development, and its own history is at least as instructive as the individual traditions it draws on. Joscelyn Godwin's documented history of the Theosophical movement and the wider nineteenth century Western esoteric revival traces how figures within that movement encountered qi, prana and comparable Asian concepts largely through translation and popularization rather than sustained study within the originating tradition, and built a generalized Western vocabulary of vital force and universal energy on top of borrowed non-Western terms whose own traditions used those terms far more specifically.
That documented history matters for how an entry is written, because a term like prana, read on its own terms within Indian yogic and Ayurvedic literature, means something considerably more specific and more embedded in a working medical and spiritual system than the generalized life force it became once absorbed into the Theosophical movement's own synthesis, and later Western developments, Reiki's own subtle energy concept among them, are separate developments this synthesis sits alongside rather than a single unbroken chain running back to any one Asian tradition.
An entry uses this documented history of the Western reception to keep a concept's own textual and cultural origin distinct from what a later comparative or popularizing account made of it, naming plainly where a modern description has simplified, generalized or genuinely altered what a tradition's own practitioners hold their own vocabulary to mean.