Verse 18

प्रथितगुणान्सुगुरून्निषेव्य यत्ना-दमलधिया प्रविचार्य चित्तरत्नम् ।गतिममलामुपयान्ति मानवास्तेपरमवलोक्य चिरं प्रकाशमन्तः

In plain words

Having served, through effort, gurus of renowned virtue, and having examined, with a stainless understanding, the jewel of the citta, those men attain the stainless path, having long beheld, within, the supreme light.