There are two Kapilas. So one is imitation; one is real. The real Kapila, He is known therefore Devahūti-putra, "the son of Devahūti." Devahūti was the daughter of Manu, Vaivasvata Manu. So in this way, kapilaḥ kumāro manuḥ. Then Prahlāda Mahārāja. Prahlāda Mahārāja was the son of Hiraṇyakaśipu, the famous demon.
So it is not that a demon's son will be demon. That is not. . . Kṛṣṇa consciousness can be achieved by anyone. Kṛṣṇa says in the Bhagavad-gītā, māṁ hi pārtha vyapāśritya ye 'pi syuḥ pāpa-yonayaḥ (BG 9.32). Pāpa-yoni means to take birth in low class family or demonic family. So pāpa-yonayaḥ. Kṛṣṇa says openly, ye 'pi syuḥ pāpa-yonayaḥ. Anyone, it doesn't matter, even if he is born in a pāpa-yoni. . . Pāpa-yoni means generally less than the śūdras. According to our Vedic system, four classes, varṇāśrama, social and spiritual division. The social division is brāhmaṇa first, then kṣatriya, then vaiśya, then śūdra. This is social division, and there is a spiritual division: brahmacārī, gṛhastha, vānaprastha, sannyāsa. This is compulsory regulation for becoming human being. Without varṇāśrama institution there is no recognition of human being. Without being trained up in the varṇāśrama system there is no question of becoming human being. So actually it is not by birth as human being but by culture. Janmanā jāyate śūdraḥ saṁskārād bhaved dvijaḥ.