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. IyengarSpirituality is not some external goal that one must seek, but a part of the divine core of each of us, which we must reveal.
B.K.S. IyengarThe practice of asanas purges the body of its impurities, bringing strength, firmness, calm, and clarity of mind.
B.K.S. IyengarRegarding perfection, that's a very difficult question. I can say that I have superseded most in my sadhana [practice]. I am in it, and my mind and my intelligence gets better in my sadhana, and it reaches a certain place. When I stretch, I stretch in such a way that my awareness moves, and a gate of awareness finally opens... My body is a laboratory, you can say. I don't stretch my body as if it is an object. I do yoga from the self towards the body, not the other way around.
B.K.S. Iyengar