To know his virtues exactly as they are, a great eagerness swells in my heart. O skillful painter, I humbly implore you.

Imagine being so eager to know someone's true qualities that your heart overflows with anticipation. This couplet captures that feeling beautifully. The speaker is overwhelmed with curiosity about a beloved's true nature. In their earnestness, they turn to a clever painter, practically pleading with them. It's as if they believe a skilled artist can somehow reveal the deeper essence or unspoken traits of the person they're so keen to understand. It's a heartfelt request, expressing a deep longing to truly know and appreciate the beloved's character through the medium of art.