Verse 12

चित्ताक्रमणमात्रात्तु परमादौषधादृते ।प्रयत्नेनापि संसारमहारोगो न शाम्यति

In plain words

But apart from the mere mastering of citta — the supreme medicine — the great disease of saṃsāra is not stilled, even with effort.