Background: Van Halen is an American hard rock band formed in Pasadena, California, in 1972. From 1974 until 1985, the band consisted of guitarist Eddie Van Halen, vocalist David Lee Roth, drummer Alex Van Halen, and bassist Michael Anthony. The band went on to become major stars, and by the early 1980s they were one of the most successful rock acts of the time. 1984 was their most successful album.
Context: David Lee Roth called Eddie to discuss what tracks would be included on a planned Van Halen compilation (work on which had actually begun before Hagar's departure). They got along well, and Eddie invited him up to his house/studio. Shortly afterwards, Roth re-entered the studio with the band and producer Glen Ballard. Two songs from those sessions were added to the band's Greatest Hits album and released as singles to promote it.  In September, Van Halen was asked to present an award at the 1996 MTV Video Music Awards. They agreed, and on September 4, 1996, the four original members of Van Halen made their first public appearance together in over eleven years. This helped to bring the compilation to No. 1 on the U.S. album charts. However, unknown to Roth, Eddie and Alex were still auditioning other singers, including Mitch Malloy.  The band's appearance on the 1996 MTV Video Music Awards fueled reunion speculation. But several weeks after the awards show, it was discovered that Roth was out of Van Halen again. Roth released a statement in which he apologized to the media and the fans, stating that he was an unwitting participant in a publicity stunt by Van Halen and manager Ray Danniels. The next day, Eddie and Alex released their own statement, claiming they had been completely honest with Roth and had never suggested he was guaranteed to be the next lead singer.  Eddie Van Halen would later explain (in regard to the MTV Video Music Awards appearance) that he had initially been embarrassed by Roth's antics while on camera behind Beck, who was giving an acceptance speech for the award that Van Halen had presented to him. Immediately following this, the band had been taken to a backstage press conference where press queries about a reunion tour were met with Eddie Van Halen saying that he needed a hip replacement and would have to record an entire new studio album before any tour. In private Roth told Eddie to avoid talking about negative things like his hip and the two almost came to blows, thereby shattering any chance of a full-scale reunion.
Question: How did Van Halen reunite with Roth?
Answer: They got along well, and Eddie invited him up to his house/studio.

Problem: Background: Bhaktisiddhanta Sarasvati (Bhaktisiddhanta Sarasvati; Bengali: bhktisiddhaant srsbtii; Bengali: [bhoktisiddhanto SoroSboti] ( listen); 6 February 1874 - 1 January 1937), born Bimala Prasad Datta (Bimala Prasad Datta, Bengali: [bimola proSad dotto]), also referred to as Bhaktisiddhanta Sarasvati Thakura, was a prominent guru and spiritual reformer of Gaudiya Vaishnavism in the early 20th century in India. Bimala Prasad was born in 1874 in Puri (Orissa) a son of Kedarnath Datta Bhaktivinoda Thakur, a recognised Bengali Gaudiya Vaishnava philosopher and teacher. Bimala Prasad received both Western and traditional Indian education and gradually established himself as a leading intellectual among the bhadralok (Western-educated and often Hindu Bengali residents of colonial Calcutta), earning the title Siddhanta Sarasvati ("the pinnacle of wisdom"). Under the direction of his father and spiritual preceptor, Bimala Prasad took initiation (diksha) into Gaudiya Vaishnavism from the Vaishnava ascetic Gaurakishora Dasa Babaji, receiving the name Shri Varshabhanavi-devi-dayita Dasa (Sri Varsabhanavi-devi-dayita Dasa, "servant of Krishna, the beloved of Radha"), and dedicated himself to arduous ascetic discipline, recitation of the Hare Krishna mantra on beads (japa), and study of classical Vaishnava literature.
Context: The encounter with and initiation from Gaurakishora Dasa Babaji, an illiterate yet highly respected personality, had a transformational effect on Siddhanta Sarasvati. Later, reflecting on his first meeting with the guru, Bhaktisiddhanta Sarasvati recalled:  It was by providential dispensation that I was able fully to understand the language and practical side of devotion after I had met the practicing master [Gaura Kishora Das Babaji]....No education could have prepared me for the good fortune of understanding my master's attitude....Before I met him my impression was that the writings of the devotional school could not be fully realised in a practical life in this world. My study of my master, and then the study of the books, along with the explanations by Thakura Bhaktivinoda [Bhaktisiddhanta's father Kedarnatha Datta], gave me ample facility to advance toward true spiritual life. Before I met my master, I had not written anything about real religion. Up to that time, my idea of religion was confined to books and to a strict ethical life, but that sort of life was found imperfect unless I came in touch with the practical side of things.  After receiving initiation, Siddhanta Sarasvati went on a pilgrimage of India's holy places. He first stayed for a year in Jagannath Puri, and in 1904 travelled to South India, where he explored various branches of Hinduism, in particular the ancient and vibrant Vaishnava Shri and Madhva sampradayas, collecting materials for a new Vaishnava encyclopaedia. He finally settled in Mayapur 130 km north of Calcutta, where Bhaktivinoda had acquired a plot of land at the place at which, according to his research, Chaitanya Mahaprabhu was born in 1486. At that time, Bhaktivinoda added the prefix "bhakti" (meaning "devotion") to Siddhanta Sarasvati, acknowledging his proficiency in Vaishnava studies.  Starting from 1905, Bhaktisiddhanta Sarasvati began to deliver public discourses on the philosophy and practice of Chaitanya Vaishnavism, gathering a following of educated young Bengalis, some of whom became his students. While assisting Bhaktivinoda in his developing project in Mayapur, Bhaktisiddhanta vowed to recite one billion names of Radha (Hara) and Krishna - which took nearly ten years to complete - thus committing himself to the lifelong practice of meditation on the Hare Krishna mantra taught to him first by his father and then by his guru. The aural meditation on Krishna's names done either individually (japa) or collectively (kirtana) became a pivotal theme in Bhaktisiddhanta's teachings and personal practice.
Question: for what?
Answer: