Yoga is an experiential science. There are plenty of books about yogic techniques, but it can only be learned and internalized by practice. Whenever I give a class, I try to reach that moment of expansive stillness that offers us a glimpse of the eternal. I usually do a savasana mid-class, then sing or chant mantra. The changing (prakriti) gives way to the stillness of silence and I can feel that wonderful ephemeral relaxation descend upon the group. I gently ease back into movement, first observing the mind, inviting it to remain present for the rest of the practice, before doing some gentle pranic postures, like apanasana or dvipada-pitham with bandhas, before sitting for pranayama. It's just my way of constructing a class, my humble offering. AUM.