Sri Bhagavat Sandarbha, Volume 1

In his purport, Srila Prabhupada wrote: "The Bhagavata-sandarbha is also known as the Sat-sandarbha. In the first part, called Tattva-sandarbha, it is proved that Srimad-Bhagavatam is the most authoritative evidence directly pointing to the Absolute Truth. The second Sandarbha, called Bhagavat-sandarbha, draws a distinction between impersonal Brahman and localized Paramatma and describes the spiritual world and the domination of the mode of goodness devoid of contamination by the other two material modes. In other words, there is a vivid description of the transcendental position known as suddha-sattva.