According to expert opinion, Balarama, as the chief of the original quadruple forms, is also the original Sankarsana. Balarama, the first expansion of Krsna, expands Himself in five forms: (1) Maha-sankarsana, (2) Karanabdhisayi, (3) Garbhodakasayi, (4) Ksirodakasayi, and (5) Sesa. These five plenary portions are responsible for both the spiritual and material cosmic manifestations. In these five forms Lord Balarama assists Lord Krsna in His activities. The first four of these forms are responsible for the cosmic manifestations, whereas Sesa is responsible for personal service to the Lord. Sesa is called Ananta, or unlimited, because He assists the Personality of Godhead in His unlimited expansions by performing an unlimited variety of services. Sri Balarama is the servitor Godhead who serves Lord Krsna in all affairs of existence and knowledge. Lord Nityananda Prabhu, who is the same servitor Godhead, Balarama, performs the same service to Lord Gauranga by constant association.