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The sleeping tortoise takes all its limbs into its carapace. So does the yogi: going back into himself he does not see anything worldly any longer, he makes peace in himself.

B. K. S. Iyengar (2016). “Sparks of Divinity: The Teachings of B. K. S. Iyengar”, p.52, Shambhala Publications
The sleeping tortoise takes all its limbs into its carapace. So does the yogi: going back into himself he does not see anything worldly any longer, he makes peace in himself.