Śāstric injunction is there. It is spoken by Nārada Muni, not ordinary person, but the great authority Nārada. He was instructing about this varṇāśrama-dharma to Mahārāja Yudhiṣṭhira, and he said, he summarized, "My dear king,"
- yasya yal lakṣaṇaṁ proktaṁ
- puṁso varṇābhivyañjakam
- yad anyatrāpi dṛśyeta
- tat tenaiva vinirdiśet
- (SB 7.11.35)
This is instruction.
So here is the lakṣaṇam, symptom, who is brāhmaṇa: śamaḥ. Śamaḥ means controlling the sense, controlling the mind. In every circumstances mind is steady, that is called śamaḥ. And damaḥ means senses, controlling the senses. My tongue is dried up, asking for a cigarette. Now, if I am brāhmaṇa, then I shall say: "No, you cannot smoke." That is damaḥ. That is damaḥ. A . . . senses may dictate me . . . we are . . . now, at the present moment, we are all servants of the senses. I have already explained that our real occupational duty is to become servant. So instead of becoming servant of Kṛṣṇa, we are now servant of our senses. This is our material life. So if you, instead of becoming servant of the senses, if you become master of the senses, then you are a brāhmaṇa. Then you are a brāhmaṇa. Not that you remain a servant of the senses, and because you are born in a brāhmin family you remain a brāhmin. This is miscalculation. This is not allowed.