The Single-Plank Bridge

Billions cross it. Oddly,
They conquer what’s behind.
The bridge is so narrow,

Only one at a time
Can cross, and no one knows
If anyone has crossed

For sure. Still they pour through
Somehow, as through a hole
In the world, which does fine

Producing more of them
To follow the others
Across the bridge. Glory

To the world. None return,
And the bridge can’t be burned.