He answered: 'This' (repeating some of what they had told him). The teacher said: 'My friend, they have taught you about the worlds, but I shall tell you this; and as water does not cling to a lotus leaf, so no evil deed clings to one who knows it.' He said: 'Sir, tell it me.'

In plain words: Upakosala repeats some of what the fires said. Satyakama says they only taught him about the worlds, and promises to teach something deeper: knowledge so pure that wrong deeds cannot stick to the one who knows it, like water rolls off a lotus leaf.