So Śukadeva Gosvāmī assimilated the Vedic knowledge and he was after Kṛṣṇa. Although he was liberated soul, still, he was after Kṛṣṇa. To become liberated is not the final stage. Liberated means one who understands that he is not this material body—he is liberated. But that much knowledge is not sufficient. One must act according to that. Just like one is cured of the feverish condition. One was suffering some fever; now there is no fever. That's nice. But that is called convalescent stage. In the convalescent stage, if we do not take care nicely, again the fever may be relapse. That is marginal stage. We must come this side or that side. So even if we are liberated, if we are not engaged in the activities of liberation, then we are to be considered on the marginal stage. And marginal stage means we may fall down in this material condition. Āruhya kṛcchreṇa paraṁ padaṁ tataḥ patanty adho 'nādṛta-yuṣmad-aṅghrayaḥ (SB 10.2.32). Āruhya kṛcchreṇa. Kṛcchreṇa means with great difficulty. The philosophers, they try to understand the Absolute Truth by mental speculation. But simply by mental speculation you cannot stay in that understanding. Or, in other words, by theoretical knowledge you cannot escape. It must be practiced. Practiced.
So in our Kṛṣṇa consciousness movement we are putting the candidate into practice. Without practice, simply knowledge is no good. That is... Simply foolishly to become puffed up that "I am now liberated," no. That is not liberation. That is explained in Śrīmad-Bhāgavatam elsewhere. Ye 'nye 'ravindākṣa vimukta-māninaḥ. Vimukta-māninaḥ. They're thinking that they have become liberated. Just like the Māyāvāda sannyāsīs, they address amongst themselves as "Nārāyaṇa." That means everyone has become Nārāyaṇa. The modern increase of incarnation of God means this Māyāvāda philosophy. Because in the Māyāvāda philosophy everyone thinks that he is God, Nārāyaṇa. "I have become Nārāyaṇa." Brahma-bhūta (SB 4.30.20). "Now I have become Nārāyaṇa." No. You cannot become Nārāyaṇa. You can become Nārāyaṇa's dāsa, servant. That is your healthy state.