This one is slightly different than my norm as I have stuck to a rhyming structure. Comments welcome!

Freedom eludes us
the moment of flight.
Bars that once caged us
loom black out of sight.

Any lengths travelled
map straight back to Here.
The grace of our wings
beats heavy with fear.

A tether holds tight
and keeps us from sky.
For fear can weigh down
a thing that can fly.

We need but glance back
where we aim to part
to finally know
what cages our heart.