Energy is Eternal Delight

Energy (esotericism)

The term energy has been widely adopted by writers and practitioners of various forms of spirituality and alternative medicine to refer to a variety of ideas, often (though not always) conceived as "fields" surrounding the earth or any living thing, supposed to be directly perceptible and accessible to the human mind as "auras", "rays", "fields" or "vibrations". There is no scientific evidence for those kinds of energy or fields, indeed energy is very well defined in science. The term was borrowed from physical science as an analogy where, for example, in physics, measurable quantities of energy are associated with a variety of observable phenomena including waves, potential fields, and even matter itself. Unlike in the physical sciences, spiritual energy is not necessarily considered by those who believe in its existence to be something that can be directly measured or observed in a laboratory. Still, many believers in spiritual energy have used the discoveries of modern physics including relativity and quantum mechanics to support their beliefs in both allegorical and pseudoscientific ways.
In many cases "energy" is conceived of as a universal life force: to this extent "spiritual energy" theories resemble vitalism and may even invoke the Luminiferous Ether of Victorian physics. Additionally, or alternatively, such notions are often aligned with or derived from conceptions found in other cultures, such as the Chinese idea of Qi and the Prana of the Upanishads. Many such ideas arise from the primitive idea of life as breath - a relationship implicit also in the word "spirit".
Such a usage is already evident in William Blake's The Marriage of Heaven and Hell (1793);
"Energy is the only life and is from the Body and Reason is the bound or outward circumference of Energy. Energy is Eternal Delight."

Source: http://en.wikipedia.org/