The process of bodily self-consciousness—the misunderstanding that I am this material body and mind and, for that matter, that I am part and parcel of this material world and that everything in this material world is thus an object for my enjoyment—does not allow me to become a transcendentalist or a really learned fellow. Up to this point, we have already discussed this transcendental knowledge somewhat. And on the basis of this preliminary discussion, the Personality of Godhead, Śrī Kṛṣṇa, advises us to become spiritually inclined, to become transcendentalists. Then only can we understand that we are nothing whatsoever of this material world, that we are eternal, spiritual living entities. By such spiritual realization, disintegration of our material affinity naturally begins, and the more we become spiritually developed, the less we are affected by the happiness or distress that arise out of sense perception in contact with material association. The false ego created by material contact is then gradually vanquished, and this dismantling of false egoism causes liberation from all material designations and renewed awareness of our relationship with the Absolute Truth. This is called liberation in life.
Śrī Kṛṣṇa, the Personality of Godhead, is the Absolute Truth. This is corroborated in all authentic scriptures. Our spiritual life begins to develop as soon as our relationship with Śrī Kṛṣṇa is reawakened. Śrī Kṛṣṇa is compared to the sun. The darkness of nescience disappears as soon as our relationship with Śrī Kṛṣṇa is established. With the appearance of Śrī Kṛṣṇa within our heart, we become cleansed of the impurities of material contact, much as the morning appears new and fresh with the appearance of the sun. This is not a concoction of childish imagination but a factual experience of spiritual realization. One who has sincerely followed the footsteps of Śrī Kṛṣṇa or His bona fide servants has also realized this simple truth.
But one who envies Śrī Kṛṣṇa and poses himself as a competitor of Śrī Kṛṣṇa—one with such a foolhardy and perverted mentality does not accept this statement of fact. Thus, without understanding the primacy of karma-yoga, the foolish mundaners indulge in unrestricted material activities resulting in bondage; their very work keeps them in the material existence of births and deaths perpetually. Such foolish mundaners actually envy Śrī Kṛṣṇa and deride Him as one who is like other mundaners. The truth about Śrī Kṛṣṇa does not easily enter into the perverted brain of such mundaners infected with the empiric approach to philosophy. But a devoted person faithfully understands just what is actually stated in the pages of Bhagavad-gītā and does not resort to imagination, or the empiric philosophical approach, generally called "spiritual interpretation." Only such a devoted person can accept the logic of fully surrendering unto Kṛṣṇa and can thus adopt the process of karma-yoga to escape the dangerous bondage of work.
(Message of Godhead).

The Vedic literatures are made by and are meant for the Supreme Lord, the demigods are also meant for serving the Lord as parts of His body, the different planets are also meant for the sake of the Lord, and different sacrifices are performed just to please Him.
According to the Vedānta-sūtras (śāstra-yonitvāt), the Supreme Lord is the author of all revealed scriptures, and all revealed scriptures are for knowing the Supreme Lord. Veda means knowledge that leads to the Lord. The Vedas are made just to revive the forgotten consciousness of the conditioned souls, and any literature not meant for reviving God consciousness is rejected at once by the nārāyaṇa-para devotees. Such deluding books of knowledge, not having Nārāyaṇa as their aim, are not at all knowledge, but are the playgrounds for crows who are interested in the rejected refuse of the world. Any book of knowledge (science or art) must lead to the knowledge of Nārāyaṇa; otherwise it must be rejected. That is the way of advancement of knowledge. The supreme worshipable Deity is Nārāyaṇa. The demigods are recommended secondarily for worship in relation to Nārāyaṇa because the demigods are assisting hands in the management of the universal affairs. As the officers of a kingdom are respected due to their relation to the king, the demigods are worshiped due to their relation to the Lord. Without the Lord's relation, worship of the demigods is unauthorized (avidhi-pūrvakam), just as it is improper to water the leaves and branches of a tree without watering its root. Therefore the demigods are also dependent on Nārāyaṇa. The lokas, or different planets, are attractive because they have different varieties of life and bliss partially representing the sac-cid-ānanda-vigraha (Bs. 5.1). Everyone wants the eternal life of bliss and knowledge. In the material world such an eternal life of bliss and knowledge is progressively realized in the upper planets, but after reaching there one is inclined to achieve further progress along the path back to Godhead. Duration of life, with a proportionate quantity of bliss and knowledge, may be increased from one planet to another. One can increase the duration of life to thousands and hundreds of thousands of years in different planets, but nowhere is there eternal life. But one who can reach the highest planet, that of Brahmā, can aspire to reach the planets in the spiritual sky, where life is eternal. Therefore, the progressive journey from one planet to another culminates in reaching the supreme planet of the Lord (mad-dhāma), where life is eternal and full of bliss and knowledge. All different kinds of sacrifice are performed just to satisfy Lord Nārāyaṇa with a view to reach Him, and the best sacrifice recommended in this age of Kali is saṅkīrtana-yajña, the mainstay of the devotional service of a nārāyaṇa-para devotee.
(Srimad Bhagavatam--2:5:15--translation and purport).