What are these tresses, troubled by the beauty's current, that come into my eyes, a wave, a familiar river?

This beautiful couplet paints a vivid picture of attraction. The poet asks, 'Whose beautiful, messy tresses are these?' He compares the beloved's hair to the waves of a deeply familiar river. It suggests that her beauty is not just visible, but it flows into his very soul, overwhelming him like the constant rhythm of a river's tide. It's a celebration of intoxicating, natural beauty.