Why Study the  Vedantra Sutra ?
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Therefore, in this prayer of the Author of  Bhagwatam , the first proposition is that Lord Sri Krishna is the Primeval Lord, and if any transcendental nomenclature for the Absolute Personality of Godhead has to be understood, it must be the Name indicated by the word  Krishna , the All-attractive. In the  Bhagavad Gita  in many passages the Lord has affirmed Himself as the Original Personality of Godhead, and it is confirmed by Arjuna, with the authorized statements of great sages like Narada, Vyasa, and many others. In the  Padma Puranam  also it is said that, of innumerable Names of the Lord, the Name of Krishna is the principal Name. Therefore, although Vasudeva indicates the plenary portion of the Personality of Godhead, and although all the different Forms of the Lord are identical with Vasudeva, in this text Vasudeva is principally meant to indicate the Divine Son of Vasudeva and Devaki. Sri Krishna is always meditated upon by the  Paramhansas , or the most perfect of the renounced order of life. This Vasudeva, or Lord Sri Krishna, is the Cause of all causes. Everything that exists is an emanation from the Lord, and how this so happens is explained in later chapters of  Srimad Bhagwatam .
The  Bhagwat Puranam  ( Srimad Bhagwatam ) is described by Mahaprabhu Sri Chaitanya as the spotless  Puranam , because It contains the transcendental narration of the Personality of Godhead Sri Krishna. The history of  Srimad Bhagwatam  is also very glorious. It was compiled by Sri Vyasadeva from His mature experience of transcendental knowledge under the instruction of Sri Naradaji, His Spiritual Master. Vyasadeva compiled all the Vedic literature, namely the four divisions of the  Vedas , the  Vedanta Sutra  or  Brahma Sutras , the  Puranas , and the  Mahabarata . But He was still not delighted in His mind. This was observed by His Spiritual Master, and thus Narada advised Him to write on the transcendental activities of the Lord, Sri Krishna. The transcendental activities of Lord Sri Krishna are described specifically in the Tenth Canto of the Book, which is considered to be the substance. But, in order to reach the substance of the Tenth Canto, one has to approach gradually by developed knowledge of the categories.
Generally, a philosophical mind is inquisitive to know what is the Origin of all creations. He sees the night sky and naturally asks what are the stars, how are they situated, who lives there, and so on. All these inquiries are quite natural for a human being, because he has a more developed consciousness than the animals. And to answer at once such a sincere inquirer, the Author of the  Srimad Bhagwatam  says that the Lord is the Origin of all creations. He is not only the Creator, but He is also the Maintainer of the cosmic situation,