Once upon a time, we believed the world was flat --
That beyond a certain point, there would be nowhere to go.
And though we now know the world is round,
we still fear falling off imaginary edges,
too often thinking there is only so far we can stretch,
so hard we can push.
But the most dangerous limits are those in our own head.
When you feel you're at your edge, look again --
You can go farther.