108 Sūtra Study Pointers – 39 – Prāṇāyāma is a key to the door of Dhāraṇā. Posted on October 1, 2018October 11, 2018 by Paul Harvey Prāṇāyāma is a key to the door of Dhāraṇā. Commentary on Yoga Sūtra Chapter Two verse 53 Link to Series: 108 Sutra Study Pointers Share this:TweetWhatsAppEmailPrint Related