Prabhupāda: Those who are śūdras, they should not be allowed to take sannyāsa. Only those who are qualified brāhmaṇas, they'll be allowed to take sannyāsa.
Bhagavān: Kṣatriyas used to take sannyāsa too?
Prabhupāda: Kṣatriyas... Some of them. Not all.
Guru dāsa: Yudhiṣṭhira Mahārāja?
Prabhupāda: Eh?
Guru dāsa: Yudhiṣṭhira Mahārāja.
Prabhupāda: They did not take sannyāsa, but they left home. There is no need of accepting sannyāsa. One has to perform the devotional activities. That is real thing. Simply by changing dress, one does not improve. Unless he takes to the, seriously, principles of devotional service. But in the Kali-yuga, they'll think, "Because I have changed my dress, I have become a big sannyāsī." You see? "Because I have got a sacred thread, now I am a brāhmaṇa." No. There must be regular training. Hare Kṛṣṇa.