If you have the desire of wanting what is true to be true, then your desire is already fulfilled. Where is the unreasonable nature and its subsequent greed? Is it in that you wish for it to remain true?

Do you have a specific example in mind?
Anybody that wants to alter the world has such a desire, and for those that want to reshape it completely, that would cross into greed territory, I think. That's not very specific, though.