Throughout mankind's cultural history there has existed the metaphysical concept that man and cosmos are interconnected by a ubiquitous, all-pervasive sea of energy that undergirds, and is manifest in, all phenomena. This pre-scientific concept of a cosmic energy goes by many names in many traditions, such as ch'i, ki or qi (Taoism), prana (yoga), mana (Kahuna), barakah (Sufi), élan vital (Bergsonian metaphysics), and so forth.

Complementary to the above metaphysical concept, contemporary physics similarly posits an all-pervasive energetic field called quantum vacuum energy, or zero-point energy, a random, ambient fluctuating energy that exists even in so-called empty space.

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