108 Rāja-vidyā: The King of Knowledge
iti matvā bhajante mām budhā bhāva samanvitāḥ
“I am the source of all spiritual and material worlds. Everything emanates from Me. The wise who know this perfectly engage in My devotional service and worship Me with all their hearts.” (Bg. 10.8)
The well-versed person or  budhāḥ  is one who has understood that Kṛṣṇa is the origin of all emanations. Whatever we happen to see is but an emanation of Kṛṣṇa. For millions and millions of years sunshine has been emanating from the sun, and yet the sun is as it is. Similarly, all material and spiritual energies are coming from Kṛṣṇa. As a result of knowing this, one becomes a devotee of Kṛṣṇa.
Thus one who knows that he must work in Kṛṣṇa consciousness, who no longer desires to enjoy this material world, is actually learned. Everyone is working in the material world due to lust ( kāma ), but the wise man is free from the dictations of this lust ( kāma-saṅkalpa-varjitāḥ ). How is this possible?  Jñānāgni-dagdha-karmāṇam:  the fire of knowledge burns up all reactions of sinful activities. It is the most potent of purifiers. Our lives have meaning and direction only in so far as we strive to attain this transcendental knowledge of Kṛṣṇa consciousness,  rāja-vidyā , which is the king of all knowledge.