The idea of the etheric body, also known as the vital body or energy body, is a key component in several esoteric, spiritual, and metaphysical traditions. It is recognized as to be always a subtle counterpart to the physical body, acting as a link between the physical and spiritual realms. Unlike the physical body, which comprises dense matter, the etheric body is thought to be made of a better, more subtle form of energy. This energy is often described as a luminous field that permeates and surrounds the physical body, extending a couple of inches beyond it. The etheric body is believed to play a crucial role in maintaining physical health, because it may be the template or blueprint upon which the physical body is built.

In traditional Chinese medicine, the etheric body is closely related to the concept of Qi or vital energy. Qi flows through the body's meridians, a network of energy channels, to sustain life and health. Once the flow of Qi is balanced and unobstructed, the physical body remains healthy. Conversely, blockages or imbalances in the flow of Qi can lead to illness. Acupuncture, Tai Chi, and Qigong are practices targeted at regulating and enhancing the flow vital energy Qi within the etheric body to market overall well-being. Similarly, in Ayurveda, the etheric body is associated with the concept of prana, living force that animates all living beings.

The etheric body is usually described with regards to chakras and nadis in Hindu and Buddhist traditions. Chakras are energy centers located across the spine, from the base to the crown of the head, each associated with various physical, emotional, and spiritual functions. Nadis are energy channels that carry prana through the body. There are believed to be 1000s of nadis, with the three most critical being the Ida, Pingala, and Sushumna. The etheric body is reported to be intricately linked to these energy structures, influencing and being influenced by their states.

In Western esoteric traditions, such as for instance Theosophy and Anthroposophy, the etheric body is recognized as the first layer of the human energy field. Based on Theosophists like Annie Besant and C.W. Leadbeater, the etheric body consists of etheric matter, that is finer than physical matter but nonetheless area of the material world. Rudolf Steiner, the founder of Anthroposophy, also emphasized the significance of the etheric body, describing it as the life force that animates the physical form. He believed that the etheric body plays an essential role in growth, healing, and regeneration.

The etheric body is considered to interact with the physical body through the endocrine and nervous systems. It is thought that the chakras are linked to the major endocrine glands, and that the flow of energy through the nadis influences the nervous system. This interaction is believed to be responsible for the regulation of bodily functions and the maintenance of health. Once the etheric body is strong and balanced, it supports the physical body's vitality and resilience. However, if it is weakened or disrupted, it could result in physical and emotional problems.