What are Chakras?
Charkas are the 7 wheels of light that are non-physically found in the centre vertical position of the human body.
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The image below is sourced from chakra.info: What is Chakra?
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Auras / Energy Fields
An aura or human energy field is, according to New Age beliefs, a colored emanation said to enclose a human body or any animal or object. In some esoteric positions, the aura is described as a subtle body. Wikipedia