The process is one must be free from anxiety. And how one can become free from anxiety unless one is realized Brahman soul, realized soul, brahma-bhūtaḥ? There are one after another. So evaṁ prasanna-manaso. Without being anxiety-less, nobody can understand the science of God. This is the verdict of Bhagavad, Śrīmad-Bhāgavatam. Evaṁ prasanna-manaso bhagavad-bhakti-yogataḥ. One who has executed the process of bhagavad-bhakti according to the rules and regulations, śravaṇaṁ kīrtanaṁ viṣṇoḥ (SB 7.5.23), he'll be prasanna-manaso. The same thing, as it is confirmed in the Bhagavad-gītā: brahma-bhūtaḥ prasannātmā (BG 18.54). The Bhāgavata says, evaṁ prasanna-manaso bhagavad-bhakti-yogataḥ, bhagavat-tattva-vijñānam (SB 1.2.20). Bhagavat-tattva, the science of God, is a vijñāna. It is a science. It is not sentiment. Sentiment: I close my eyes and shed some tears, and then I go for smoking cigarette. That sentiment will not help us. It is a science. Just like Caitanya Mahāprabhu said: yei kṛṣṇa-tattva-vettā sei guru haya (CC Madhya 8.128). Yei kṛṣṇa-tattva-vettā. One who knows the science of Kṛṣṇa, he can become guru. Pṛthivīṁ sa śiṣyāt. He can make disciples all over the world. Pṛthivīṁ sa śiṣyāt.
So Caitanya Mahāprabhu confirmed it:
- kibā vipra kibā śūdra nyāsī kena naya
- yei kṛṣṇa-tattva(-vettā) sei guru haya
- (CC Madhya 8.128)
It doesn't matter whether one is a gṛhastha or one is a sannyāsī or one is a brāhmaṇa or not brāhmaṇa. It doesn't matter. Because this is not the science of this physiological ana..., anatomical science, or cobbler's science. Cobbler's science means cobbler knows what kind of skin it is. It is not like that. Neither cobbler's science nor anatomical science or physiological science. Bhagavat-tattva-vijñānam. It is another science. So anyone who is well-versed in bhagavat-tattva-vijñānam, he's, he can become guru. Not others. And in many places this is confirmed, that ṣaṭ-karma-nipuṇo vipro. A brāhmaṇa, very well expert in his business... Brāhmaṇa's business means ṣaṭ-karma, six kinds of karma. Paṭhana pāṭhana yajana yājana dāna pratigraha. A brāhmaṇa must be very learned scholar. Brāhmaṇa paṇḍita. He must be scholar. Scholar means not ordinary, but in transcendental science. Tad vijñānam. So paṭhana pāṭhana. And he must be expert teacher also. He should not... Actually in our India, formerly, the brāhmaṇas, they usually become teachers. In any village, a brāhmaṇa has no other business. He sits down. He's called catuṣpāṭhī, the higher scholars. But for ordinary also. A brāhmaṇa... Guru-maharṣayaḥ. We studied under guru maharṣayaḥ in our childhood. Pāṭha śālā. So anywhere a brāhmaṇa can sit down and the village boys, small boys, children would come there. He doesn't charge anything, but their father, mother sends everything—rice, dahl, cloth. So he has no much demand for bodily necessities. This was paṭhana. This is brāhmaṇa. Brāhmaṇa should not accept any service. Formerly Sanātana Gosvāmī, because he accepted the service of Nawab Hussein Shah, he was rejected from the brāhmaṇa society. In the Bhāgavata also it is stated if a brāhmaṇa is in difficulty, he may accept the profession of a kṣatriya or a vaiśya, but never of a śūdra. Śūdra has been described there as dog. A dog, without having a master, he cannot live very nicely. Street dog is very wretched, but a dog under the care of a good master is very healthy and very happy. Similarly a śūdra cannot live without having a master. That has been described as the dog's business.