If you wish to take a ride upon the river, the boat of my eye is fully at your service, and every hair of my eyelashes is like a free charitable landing wharf.

Here, the poet paints a wonderfully vivid picture of boundless devotion using the imagery of water and sailing. He invites the beloved to take a river cruise, offering his tearful eye as the boat and his flowing tears as the endless river. Every single eyelash is imagined as a charitable riverbank or pier, open freely to the beloved—a tender way of saying that even his deepest sorrow is dedicated entirely to their pleasure.