When you first passed through them
All butterflies and sparkling eyes,
Bouncing bundles of boundless potential
In sharp creases and glistening shoes,
You will barely have noticed, the silent sentries
Marking the boundary between your worlds
Of heavenly refuge and interminable imprisonment.
Back and forth for years, growing as you go
Like a tide, each droplet herded ever onward
By buzzers and bells to meet your future selves,
You will inscribe a path across this margin
So focused on the now, all change is imperceptible.
Until, perhaps, a brief moment of reflection,
Which often strikes only as you walk out,
And they close behind you, for the final time.