Everything that am not from our planet is aliens and GOD is in that way alien as he was not born on this planet.

We are like Neanderthals compare to aliens so it is not strange that we do not understand each other or how do you think a Neanderthals should understand us today if we could meet them ?

There is a limit of age in a living beings because it ends that we meet our self in the future and aliens have reach it and will understand us better when they are coming back to where they started.