Abhinavagupta called as mahamahesvara which precisely means the great devotee of Shiva or supreme self in shaivistic tradition. Was one of the most outstanding Acharyas of Shiva Philosophy. He lived in Kashmir about the end of 10 and the beginning of 11 Centuries, according to the references about him in Sri Tantralokah and Paratrimshika Vivarana, The traditional believe amongst Kashmiri Pandits is that Abhinavagupta was a living Bhairava ( Enlighten one) in the human form
Yoga Sutras of Patanjali are one of the greatest contributions to yoga He was a great sage who systematized and organized the study and teachings of yoga. He is considered being the originator of yoga science. There is a saying in Sanskrit, “One who was born first, the first who came into manifestation, was the first teacher of yoga.” Patanjali was only the codifier of yoga science. He was a great yogi who practiced, who knew, and who made experiments. Patanjali was an enlightened being, a sage, who has given us yoga science for the benefit of all human beings.