Yoga guru B. K. S. Iyengar, known for bringing the spiritual practice to the United States, passed away Wednesday at 95 years old.

His granddaughter said that he died due to heart failure. She assured reporters that he felt fulfilled at the end of his life. “Even at the end, even a few weeks before, he said, ‘I’m satisfied with what I’ve done.’ He took yoga to the world. He knew that,” she said, as reported by the New York Times.

Born in 1918, Iyengar survived tuberculosis, typhoid and malaria during his childhood, and believed that yoga was his ultimate cure.

He developed his own form of yoga that consists of long-lasting poses, demanding mental and physical strength from the body, reported the Times. He wrote of this practice in a book titled Light on Yoga in 1966, which has been called the “bible of yoga,” according to The Hindu.

Iyengar’s children, grandchildren and great-grandchildren intend to carry on his yoga legacy.