The Iyengar style of yoga is precise. It lines up the body to still the mind and access insight. It's renowned for strictness and control. Its founder, B.K.S. Iyengar, was bullied by his guru. He passed this fierceness on to students via his family. Their teaching is often dogmatic: it seeks obedience in the name of liberation. It's helped me a lot, but I find it stifling in some ways. I've learned to combine it with other techniques. No approach to yoga works for everyone; to be devoted means exploring for oneself.