Live in it's truest essence has no purpose, you just are. But that falls into the theory of existence. Are we even? My answer to this could be said in many different ways, with many explanations. Simply put, to disprove existence would be impossible. In order to prove something by definition is to be able to find refutable evidence for something and have solid existent reasoning for it's clarity. To prove nonexistence would be an eternal paradox. Try looking at it this way, life is meaningless, but you love to live it. So stop asking and do it.