Concept
Proponents and practitioners of various esoteric forms of spirituality and alternative medicine refer to a variety of claimed experiences and phenomena as being due to "energy" or "force" that defy measurement and thus are distinguished from the scientific form of energy. Claims related to energy therapies are most often anecdotal, rather than being based on repeatable empirical evidence. There is no scientific evidence for the existence of such energy, and physics educators criticize the use of the term "energy" to describe ideas in esotericism and sprituality as potentially confusing. Concepts such as "life force", "qi" and "élan vital" existed from antiquity. In the 18th century, Franz Mesmer ignited debate with his theory of animal magnetism. Attention to vitalism grew in the 18th and 19th centuries. Interest continued into the 20th century, largely fuelled by adherents of the New Age movement. As biologists studied embryology and developmental biology, particularly before the discovery of genes, a variety of organisational forces were posited to account for their observations. German biologist Hans Driesch (1867–1941), proposed entelechy, an energy which he believed controlled organic processes. However such ideas are discredited and modern science has all but abandoned the attempt to associate additional energetic properties with life. It is not the scientific concept of energy that is being referred to in the context of spirituality and alternative medicine. As Brian Dunning writes: That's all that energy is: a measurement of work capability. But in popular culture, 'energy' has somehow become a noun. "Energy" is often spoken of as if it is a thing unto itself, like a region of glowing power, that can be contained and used. Here's a good test. When you hear the word "energy" used, substitute the phrase "measurable work capability". Does the usage still make sense? Remember, energy itself is not the thing being measured: energy is the measurement of work performed or of potential...