“Geology is the study of pressure and time. That's all it takes...” – Ellis Boyd "Red" Redding, The Shawshank Redemption ... Movie Quotes Database

Geology is the study of pressure and time. That's all it takes, really. Pressure and time. That and the big god-damn poster. Like I said, in prison, a man'll do most anything to keep his mind occupied. It turns out Andy's favorite hobby was totin' his wall out into the exercise yard a handful at a time.

More from The Shawshank Redemption

Ellis Boyd "Red" Redding Andy crawled to freedom through five hundred yards of shit-smelling foulness I can't even imagine. Or maybe I just don't want to. Five hundred yards. That's the length of five football fields, just shy of half a mile. Ellis Boyd "Red" Redding I like to think the last thing that went through his head - other than that bullet - was to wonder how the hell Andy Dufresne ever got the best of him. Ellis Boyd "Red" Redding All I do anymore is think of ways to break my parole so maybe they'd send me back. Terrible thing to live in fear. Brooks Hatlen knew it. Knew it all too well. All I want is to be back where things make sense. Where I won't have to be afraid all the time. Only one thing stops me. A promise I made to Andy.