We are them.
Care to elaborate?
I'm sure he simply means that all the while we have been evolving over those hundreds of thousands of years or whatever, there have been many other races that have evolved way faster, way beyond us, in other parts of the universe.
He probably is thinking about the one guy in one of those far-advanced races, who was so advanced that he turned into God, controls the whole spectrum of the space-time continuum, and entirely got rid of evolution from ever happening, while replacing it with something else that is a whole lot quicker and way, way better.
Exactly what that something else is, however, none of us cockroaches knows.