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in which he used the term "lucid dream" to indicate those conditions in which the dreamer is aware that they are dreaming.
The book contains the scientific and spiritual basics of dreaming, an explanation of what to do with dreams, instructions for how to interpret dreams, and a dream symbol dictionary to explain the spiritual meanings behind words. Subjects learned to have such lucid dreams; they observed their dream content and reported it soon after awakening. In 1968, Celia Green analyzed the main characteristics of such dreams, reviewing previously published literature on the subject and incorporating new data from participants of her own.
Türker, Başak; Musat, Esteban Munoz; Chabani, Emma; Fonteix-Galet, Alexandrine; Maranci, Jean-Baptiste; Wattiez, Nicolas; Pouget, Pierre; Sitt, Jacobo; Naccache, Lionel; Arnulf, Isabelle; Oudiette, Delphine (November 2023).
To the best of our knowledge, this is the first study to explore, and demonstrate, a potential long-term risk following the use of LD induction techniques.Samuel Pepys, in his diary entry for 15 August 1665, records a dream, stating: "I had my Lady Castlemayne in my arms and was admitted to use all the dalliance I desired with her, and then dreamt that this could not be awake, but that it was only a dream. Sufis often described experiencing this during voluntary periods of religious seclusion or—in the case of a number of mystics over the centuries—while imprisoned by authorities. Or, what about famous physicist Albert Einstein, who said that every major discovery he made came through a dream?