Sonnet XIII "Reason"

You made the rules, you showed a path,
Though thin, well lit and well defined.
You promised joy, you showed no wrath,
Asked only I leave Dark behind.
I did as asked with child's trust.
I swore myself  to Light.
But now I crawl weighed down by dust
A hill of endless height.
Through all I slaved to do as bade,
Convinced you cared for me.
So tired, I become afraid.
You say I'm free.
My cry:
Why?