Not flown the nest

I thought to build my nest in the heart of a forest of thorns. I did think it would secure my young, and dissuade the approach of predators. But I had forgotten that the thorns of the forest are directed inwards as well as out. My young did grow, but cramped and shrinking from the barbed walls that held us in.  As time went on, I could only grieve as each of them was blinded upon the spines which they had never learnt to avoid. Now, I cannot permit them to go out into the world, and the thorns close in tighter about us.