http://mabufs.i2p/goon-fu/how-did-doctrine-come-about
But Patanjali expounded his sutras in the language, level of knowledge and categories of the modern world, so his thoughts were hard to reach an ordinary man. And so a new devotee of Suomi Vivekananda (The Great) appeared, who commented on Patanjali's work in an accessible form. It took him all his life. С. Vivekananda went to Narvikalpa-Samadhi at the age of 40.