अयः स्पर्शे लग्नं सपदि लभते हेमपदवींयथा रथ्यापाथः शुचि भवति गङ्गौघमिलितम् ।तथा तत्तत्पापैरतिमलिनमन्तर्मम यदित्वयि प्रेम्णासक्तं कथमिव न जायेत विमलम् ॥ १२ ॥
In plain words
Iron becomes gold the instant it touches the philosopher's stone. Gutter water turns pure the moment it joins Gaṅgā. So if this heart of mine — soaked through with sin after sin — clings to you in love, how could it not turn pure?
Close to the Sanskrit
As iron, upon contact, at once attains the state of gold; as street-water becomes pure when merged with the flood of Gaṅgā — so, if my heart, exceedingly stained by this sin and that, becomes attached to you with love, how indeed would it not become stainless?