Pattabhi Jois's father was an astrologer and a priest, who acted as the pujari for many of the families in the village. From an early age, as most brahmin boys, Pattabhi Jois was taught the Vedas and Hindu rituals.
When Guruji was 12 years old, he attended a yoga demonstration at his middle school in Hassan. The next day he went to meet the great yogi who had given the demonstration, a man by the name of Sri T. Krishnamacharya, who had learned yoga for nearly eight years from his Guru, Rama Mohan Brahmachari in a cave in Tibet. For the next two years, Guruji learned from his Guru every day. When Guruji turned 14, he had his brahmin thread ceremony. Krishnamacharya left Hassan to travel and teach, and Guruji left his village to go to Mysore.
At the age of 15 Mr Iyengar was invited to Mysore to stay with his eldest sister by her husband, the scholar and yogi Sri T. Krishnamacharya, who was visiting. Krishnamacharya ran a yoga school in the palace of his patron, the Raja of Mysore, where Mr Iyengar eventually received some basic instruction in asana practice to improve his health. His guru however, was an erratic and terrifying personality who drove him hard and so at first Mr Iyengar had to struggle from day to day. This diligence in practice gradually paid off as he mastered some of the postures and improved his health.
Then in 1937 Mr Iyengar was asked by his Guru to go to Pune to teach yoga.
That's it! This is all about "different" styles what they teach in west. But in fact there is no difference. There is old film showing "ashtanga" style yoga practice of B.K.S.Iyengar and he advises in his books to learn asanas first, then connect them in vinyasas. (“Iyengar” style)
Or one can start from warming up with easy vinyasa, followed by asanas practice, moving to more complicated ones with time...(“ashtanga”)
So this is about finding what is good for practitioner and adopting yoga concept for modern life, taking time for physical and mental exercises, learning pranayama and yogic kriyas, philosophical aspects, and finally becoming a yogin.
And I do have a negativity towards ones calling yoga something which is not!
The Way of the Yogin incorporates the use of meditation, mantra and iconographic visualization, to bring the seeker into true mystical communion with the sublime and omniscient Godhead, the eternal Samyak-sambuddha itself.