Sakalya said: 'Which is thy deity in the Northern quarter?' Yagnavalkya said: 'Soma.' Sakalya said: 'In what does that Soma abide?' Yagnavalkya said: 'In the Diksha.' Sakalya said: 'In what does the Diksha abide?' Yagnavalkya said: 'In the True; and therefore they say to one who has performed the Diksha, Speak what is true, for in the True indeed the Diksha abides.' Sakalya said: 'And in what does the True abide?' Yagnavalkya said: 'In the heart, for with the heart do we know what is true, and in the heart indeed the True abides.' Sakalya said: 'So it is indeed, O Yagnavalkya.'

In plain words: Sakalya asks Yagnavalkya which god rules the north. Yagnavalkya says Soma, the moon and sacred drink. Soma rests on the Diksha (a vow taken before a ritual), the vow rests on truth, and truth rests in the heart, because we know what is true with our heart.