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In plain words

"This agrees closely with the five sheaths of Vedanta. The gross body means the sheaths of food and of the vital breath. The subtle body means the sheaths of mind and of understanding. The causal body means the sheath of bliss. The Great Cause lies beyond the five sheaths. Whenever the mind dissolved in the Great Cause, he was in samadhi. This is what is called nirvikalpa, or jada samadhi.