The Personality of Godhead recognizes a living being who is progressing in that line. Devotional service, therefore, is the culmination of the culture of all knowledge. When Śrī Kṛṣṇa, the Supreme Personality of Godhead, appeared for the deliverance of all fallen souls, He advised the deliverance of all living entities as follows. The Supreme Absolute Personality of Godhead, from whom all living entities have emanated, must be worshiped by all their respective engagements, because everything that we see is also the expansion of His energy.
(Srimad Bhagavatam---introduction).

The history of the Śrīmad-Bhāgavatam is also very glorious. It was compiled by Śrī Vyāsadeva after he had attained maturity in transcendental knowledge. He wrote this under the instructions of Śrī Nāradajī, his spiritual master. Vyāsadeva compiled all Vedic literatures, containing the four divisions of the Vedas, the Vedānta-sūtras (or the Brahma-sūtras), the Purāṇas, the Mahābhārata, and so on. But nevertheless he was not satisfied. His dissatisfaction was observed by his spiritual master, and thus Nārada advised him to write on the transcendental activities of Lord Śrī Kṛṣṇa. These transcendental activities are described specifically in the Bhāgavatam's Tenth Canto, which is considered its substance. But in order to reach the very substance one must proceed gradually by developing knowledge of the categories.
(Srimad Bhagavatam----1:1:1---purport).

The varṇāśrama-dharma is prescribed for the civilized human being just to train him to successfully terminate human life. Self-realization is distinguished from the life of the lower animals engaged in eating, sleeping, fearing and mating. Bhīṣmadeva advised for all human beings nine qualifications: (1) not to become angry, (2) not to lie, (3) to equally distribute wealth, (4) to forgive, (5) to beget children only by one's legitimate wife, (6) to be pure in mind and hygienic in body, (7) not to be inimical toward anyone, (8) to be simple, and (9) to support servants or subordinates.
(Srimad Bhagavatam----1:9:26---purport).

The kṣatriya, the member of the administrative class, is especially advised to give charity and not to accept charity in any circumstances. Modern administrators raise subscriptions for some political functions, but never give charity to the citizens in any state function. It is just the reverse in the injunctions of the śāstras. The administrative class must be well versed in the śāstras, but must not take to the profession of teachers.
(Srimad Bhagavatam----1:9:26---purport).

The vaiśyas, the members of the mercantile communities, are especially advised to protect the cows. Cow protection means increasing the milk productions, namely curd and butter. Agriculture and distribution of the foodstuff are the primary duties of the mercantile community backed by education in Vedic knowledge and trained to give in charity. As the kṣatriyas were given charge of the protection of the citizens, vaiśyas were given the charge of the protection of animals. Animals are never meant to be killed.
(Srimad Bhagavatam----1:9:26---purport).

The all-good Personality of Godhead, being the creator of the universe, also plans for the good of all good living beings. The good living beings are advised by the Lord to follow His good advice, and by doing so they become successful in all spheres of life. There is no need to worship any deity but the Lord. The Lord is all-powerful, and if He is satisfied by our obedience unto His lotus feet, He is competent to bestow upon us all kinds of blessings for the successful execution of both our material and spiritual lives. For attaining spiritual existence, the human form is a chance for all to understand our eternal relation with God.
(Srimad Bhagavatam----1:11:7---purport).