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Rāja-vidyā: The King of Knowledge
problems are automatically solved. Even the animals are enjoying mating, sleeping, eating and defending. The arrangements are all provided. These demands of the body are not really problems, but we have made them into problems. The  Vedānta-sūtra  enjoins us not to concern ourselves with these problems, for they are satisfied in any form of life. Our problem is to inquire about the source of all these manifestations. The human form of life is not meant for struggling hard to solve the material problems which even a hog, a stool-eater, can solve. The hog is considered to be the lowest among animals, yet he has eating facility, mating facility, sleeping facility, and facilities for defense. Even if we don't strive for these things, we will have them. Man is meant, rather, to find out the source from which all these things are coming. The  Vedānta-sūtra  states that Brahman is that from which everything is emanating ( janmādyasya yataḥ ). Philosophers, scientists,  yogīs ,  jñānīs  and transcendentalists are all trying to find out the ultimate source of everything. This source is given in  Brahma-saṁhitā ,  sarva-kāraṇa-kāraṇam : Kṛṣṇa is the cause of all causes.
Understanding Kṛṣṇa to be the primal source of everything, how do the great souls act? Kṛṣṇa Himself characterizes them in this way:
satataṁ kīrtayanto māṁ 
    yatantaś ca dṛḍha-vratāḥ 
    namasyantaś ca māṁ bhaktyā 
    nitya-yuktā upāsate