Commentaries on yoga by Tristan Dorling These commentaries are mostly based on questions that have been asked over the last 15 years about the Advanced Yoga Practices (AYP) system. To learn the system itself, please refer to the Public lessons, or the AYP books. OverviewWhat is yoga? On MeditationWhy use a mantra? On breathing meditationDifficulties with meditation On PranayamaWhat is pranayama? On KundaliniWhat is kundalini?What is the role of ecstasy in yoga?What is the nectar cycle? On Self InquirySelf-inquiry, the witness and non-duality