"He ploughs the waves, sows the sand, and hopes to gather the wind in a net, who places his hopes in the heart of a woman"

This quote by Jacopo Sannazaro is an alerting to guys who position their hopes in the heart of a lady. It is a suggestion that such a pursuit is futile and will just result in frustration. The imagery of ploughing the waves and sowing the sand is used to highlight the impossibility of the task. It is as if the guy is trying to do the impossible, like trying to plough the waves of the sea or sow the sand of the beach. The metaphor of attempting to gather the wind in a net additional emphasizes the futility of the job. It is a suggestion that a guy should not position his hopes in the heart of a lady, as it is an impossible job. The quote serves as a cautioning to guys to be careful of putting their hopes in the heart of a lady, as it is a difficult task and will just result in dissatisfaction.