Srimad Bhagavatam is non-different from the Supreme Lord Krishna

July 30: Canto 1 Chapter 1 Verse 1 (1.1.1)
Srimad Bhagavatam is actually the form of Krishna, all 12 canto's. It is the description of Krishna, but it is actually Krishna himself. That's why when we install Srimad Bhagavatam at home, we worship it as a deity.

Srila Vyasadev has established here that Krishna is the Supreme Personality of Godhead. Here Srila Vyasadev is making a point that here that Srimad Bhagavatam is the narration of the svarupa of the Lord manifested by His internal potency, and this potency is distinguished from the external potency which has manifested the cosmic world, which is within our experience.

Unless you come to the mode of Goodness, you cannot worship Vishnu and unless you come to the mode of pure goodness, you cannot worship Krishna. As long as we are in the 3 modes of material nature, it is not possible to worship Krishna. We need to transcend these 3 modes to worship Krishna.

When we chant Gayatri mantra, it puts us to the mode of goodness, allowing us to worship Vishnu. But Hare Krishna Mahamantra helps us transcend the 3 modes and brings us to the platform of pure unalloyed devotion, thus allowing us to worship Krishna. Thats why we have to chant our rounds very nicely.