"Their prison is only in their minds, yet they are in that prison; and . . . cannot be taken out.”"

“They have chosen cunning instead of belief. Their prison is only in their minds, yet they are in that prison; and so afraid of being taken in that they cannot be taken out.”

~ C.S. Lewis, The Last Battle

https://www.goodreads.com/work/quotes/1059917-the-last-battle