“She's like a prisoner inside stone walls, and every day the walls get a little thicker, the doorways a little narrower.""And?" Eddis prompted."Well," said Eugenides, "it's a challenge.”

“It's surprisingly nice out here, peaceful and pretty-strange to be standing in the middle of a little garden while enclosed by the massive stone walls of the prison, like being at the exact center of a hurricane, and finding peace and silence in the middle of so much shrieking damage.”

“A Little Fable"Alas," said the mouse, "the whole world is growing smaller every day. At the beginning it was so big that I was afraid, I kept running and running, and I was glad when I saw walls far away to the right and left, but these long walls have narrowed so quickly that I am in the last chamber already, and there in the corner stands the trap that I must ...”

“Whoa," said Nico as he climbed off the bus. "Is that a climbing wall?""Yeah," I (Percy) said."Why is there lava pouring down it?""Little extra challenge..." - Percy”

“Stone walls do not a prison make,Nor iron bars a cage.”

“Stupidity is like bumping into a wall all the time. After a while you get tired of it and try to look the situation over and see if there’s a doorway somewhere. I think most people eventually do look for the doorway and stop bumping into the wall”