There are so many human beings all over the world. Mostly, they're like animals—without culture. Because, according to our Vedic culture, unless one takes to the institution of varṇa and āśrama, he's not a human being. He's not accepted. So therefore Kṛṣṇa says manuṣyāṇāṁ sahasreṣu. Who is accepting this varṇāśrama? No. Chaotic condition.
So in that chaotic condition you cannot understand what is God, what is Kṛṣṇa. Therefore Kṛṣṇa says, manuṣyāṇāṁ sahasreṣu: out of many, many thousands and millions of people, one takes to the scientific institute of varṇāśrama-dharma. That means followers of the Vedas, strictly. Out of these persons who are following the Vedic principles, mostly they're attached to karma-kāṇḍa, ritualistic ceremonies. So out of many millions of persons engaged in ritualistic ceremony, one becomes advanced in knowledge. They are called jñānī, or speculative philosopher. Not karmīs, but jñānī. So out of many millions of such jñānīs, one becomes mukta, liberated.
Brahma-bhūtaḥ prasannātmā na śocati na kāṅkṣati (BG 18.54). This is liberated stage. One who is Brahman realized soul, he has nothing to lament or nothing to hanker. Because in the karmī stage we have got two diseases: hankering and lamenting. Whatever we have got, if it is lost, then I lament: "Oh, I got this and that and it is now lost." And whatever we do not possess, we hanker after. So for possessing, we hanker, we work so hard. And when it is lost, we again lament and cry. This is karmī stage.