Patañjali divided his Yoga Sutras into four chapters or books (Sanskrit pada), containing in all 196 aphorisms, divided as follows:
Samadhi Pada (51 sutras). Samadhi refers to a blissful state where the yogi is absorbed into the One. Samadhi is the main technique the yogin learns by which to dive into the depths of the mind to achieve Kaivalya. The author describes yoga and then the nature and the means to attaining samādhi. This chapter contains the famous definitional verse: "Yogaś citta-vritti-nirodhaḥ" ("Yoga is the restraint of mental modifications").]Since the Nirvana of Gurudev in 1969, for the last thirty years, wherever Swami Ji stayed, several cloistered holy people, thousands of devotees from the regions and plenty of grief-stricken people had a unique opportunity to regularly interact with him and seek his blessings. Making necessary uninterrupted, arrangements for the people travelling from very long distance of free service of snacks, food and rest without even seeking help from others is certainly a miraculous feat.