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One of the four brain wave patterns, the delta state is typified by patterns that repeat at the speed of .5-3 Hertz (cycles per second). People in deep sleep or who are unconscious are in the delta state. It is also the speed of the brainwaves typified by some forms of very deep meditation. The other brain wave patterns are alpha, beta, and theta.
Vote now for your favorite Llewellyn books and decks in the 2021 CARTA Awards from the International Tarot Foundation!
Best Tarot Deck
Edgar Allan Poe Tarot, by Rose Wright & Eugene Smith
Dark Wood Tarot, by Sasha Graham &...
New Worlds of Body, Mind & Spirit Since 1901
