"Something" [boomerang]

They came to tell us something   but what is it?
    let's watch the slow progression   of the stars
too slow to even see!   I wonder   does it
    describe our own progression?   rapid cars
    run faster than a river!   even ours
our life (too hasty)   seems a hurried visit
    remind me   of the seven Avatars
they came to tell us something   but what is it?