Faith, courage, and intelligent and uninterrupted awareness - these qualities are to be present whether one is wide awake, half asleep, or in deep slumber. An individual who lives like this performs his daily actions with a mind free from selfishness. This is poise in action. And this poise leads to that serenity which is in the truest sense a healthy mind in a healthy body.

Sparks of Divinity: The Teachings of B. K. S. Iyengar (ed. Shambhala Publications, 2016) - ISBN: 9781930485808