Verse 13

उपदेशगिरो वृद्धे रञ्जना निर्मले पटे ।लगन्त्युदारविज्ञानकथा चाधिगतात्मनि

In plain words

Words of instruction take hold in the mature, as dye takes to a stainless cloth; and the discourse of exalted vijñāna takes hold in one who has come to know ātman.