In plain words
Once Vaśiṣṭha was sitting in the full-moon light with his wife Arundhatī, and while they talked in many ways of the phases of the moon, this Arundhatī says: "Today he is the full moon. There are no flaws in the moon." As they chatted so, Vaśiṣṭha says: "Yes, yes. Today the moon shines without any spot of flaw, like Viśvāmitra's tapas." This matter Viśvāmitra himself heard, the very man who had come resolved to make an end of Vaśiṣṭha and lay hidden in a bush; he heard the matter. He threw away the sword in his hand. Before his own wife he praises his power of tapas so highly. To bear hatred against such a man is my fault. This is the working of rajoguṇa. Chee! This rajoguṇa will make one do any deed, however great! He ran and fell at Vaśiṣṭha's feet. The moment he fell at Vaśiṣṭha's feet, Vaśiṣṭha, without even looking at his face, blessed him: "Viśvāmitra! Brahmarṣi! Arise." he said. Vaśiṣṭha had been calling him rājarṣi all this time; quite naturally, without any of that, the word brahmarṣi came from his mouth. Unable to contain this joy, Viśvāmitra: "What is the reason I have become a brahmarṣi? Why do you call me brahmarṣi?" he asked. Viśvāmitra! All this time you were sunk in Ahaṅkāra. You were born in Ahaṅkāra. You grew up in Ahaṅkāra. You lived in Ahaṅkāra. You were not one who bowed his head to anyone. But today you have rooted out your Ahaṅkāra and fallen at my feet. This is the very sign of freedom from Ahaṅkāra. That is why you have now become a brahmarṣi. He alone who has gone far from evil qualities such as Ahaṅkāra, pride, possessiveness and ostentation is a brahmarṣi. Not dwelling in his mind on learning of any kind, on studies or on scholarship: I am merely a doll in God's hand; each and every thing is only God's play; He can make the dolls in His hand dance in whatever way He wishes them to dance. The day such feelings arise in a man, that is the right sign of a true brahmarṣi. Through the pride and possessiveness of "I am doing it, this is mine, this is yours", man sinks deep in Ahaṅkāra, and after that he goes on turning into merely a rājarṣi. I: Ahaṅkāra. Mine: mamakāra. The day this Ahaṅkāra and mamakāra are rooted out in man,