Institutionalized

"This is all he knows. In here, he is an important man; an educated man. Outside, he is nothing. Just a used-up con with arthritis in both hands."

"These walls are funny. First you hate them. Then you get used to them. Enough time passes, and you get to depend on them. That's 'institutionalized'". - The Shawshank Redemption

What an irony! A man depending on the walls of his prison! The gates of the cage are wide open, yet the bird wouldn't fly. Is this not a tragedy?