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That is how enlightenment is won. Buddhas as many as the Ganges' sand Entered this one gateway to Nirvana. All past Tathagathatas Have achieved this method. All Bodhisattvas now Enter this perfection. All who practice in the future On this Dharma should rely... (The Surangama Sutra: Selections from the Upasaka Lu K'uan Yu
Translation, Published by Rider and Company, London).
The Madhyamika School of Buddhism states that reality (shunya) is the transcendent, indefinable and immanent in all beings. This is also called Shunyam Tattvam.
The first state is Jagrata, the conscious state; the second is svapna, the dream state; the third is sushupti, the dreamless sleep; the fourth is Turiya, a serene transcendental state; the fifth is Turiyatita, "beyond the fourth," a state of pure awareness.
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