In the end all things die, and all things are forgotten. It may take 1 day or a thousand years, but our names, deeds, and very existences will vanish unto dust in the end. From dust man came and to dust he returns.
But while man forgets, that which is beyond man remembers. Our true legacy lies not in the annals of history but the formless memories of creation itself. While civilizations rise and fall with the wind, God will never forget