We dream out of unfinished business. These verses are not saying that we should stop having desires. That would be impossible so long as we have our minds and bodies. But what they are saying is that we should examine these desires and the true nature of desire, so that we are not driven by desire or controlled by the working of desire. We are driven by desire only because we don't know the nature of desire.
Any thought is just a result of some subtle preconscious processing.
What meditation tells us to do is to just let the thought arise and let it subside on its own. We can be just mindful and equanimous when dealing with our thinking and thoughts. That attitude is the main point of this chapter. We don't actually have to try to be anything. It reflects both the ugly and the beautiful.