Kecit means "somebody, "very rarely." "Somebody" means "very rarely." It is not so easy thing to become vāsudeva-parāyaṇāḥ. Yesterday I explained that Bhagavān, Kṛṣṇa, says that yatatām api siddhānāṁ kaścid vetti māṁ tattvataḥ, manuṣyāṇāṁ sahasreṣu kaścid yatati siddhaye (BG 7.3). Siddhi means perfection of life. Generally they take it aṣṭa-siddhi of yoga practice—aṇimā, laghimā, mahimā, prāpti, siddhi, īśitva, vaśitva, prākāmya. So these are called siddhis, yoga-siddhi. Yoga-siddhi means you can become smaller than the smallest. Our actually magnitude is very, very small. So by yoga-siddhi, in spite of having this material body, one yogi can come to the smallest size, and anywhere you keep him packed, he will come out. That is called aṇimā-siddhi. Similarly, there is mahimā-siddhi, laghimā-siddhi. He can become lighter than the swab of cotton. The yogis, they become so light. Still there are yogis in India. Of course, in our childhood we saw some yogi, he used to come to my father. So he said that he could go anywhere within very few seconds. And sometimes they go early in the morning to Jagannātha Purī, to Rāmeśvaram, to Haridwar, and take their bathing in different Ganges water and others. That is called laghimā-siddhi. He became very light. He used to say that "We are sitting with our guru and just touching. We are sitting here, and after few seconds we see in a different place." This is called laghimā-siddhi.
So there are many yoga-siddhis. People become very much puzzled by seeing these yoga-siddhi. But Kṛṣṇa says, yatatām api siddhānām: (BG 7.3) "Amongst many such siddhas, who have got yoga-siddhi," yatatām api siddhānām kaścid vetti māṁ tattvataḥ (BG 7.3), "somebody may understand Me." So one may achieve some yoga-siddhis; still it is not possible to understand Kṛṣṇa. That is not possible. Kṛṣṇa can be understood only such persons who has dedicated everything to Kṛṣṇa. Therefore Kṛṣṇa wants that, demands, sarva-dharmān parityajya mām ekam śaraṇaṁ (BG 18.66). Kṛṣṇa is only understandable by His pure devotee, not anyone else.