The man who has begun to live more seriously within begins to live more simply without. <Ernest Hemingway quotes>
"live within" means you are a reflective person. you begin to think about the things that are really important to you.
As you do that, you begin to see more values in things, like family, friendships, learning, spirituality, justice and so on.
U learn that the things "without" - the tvs, ipod, car... just aren't important & live without them, devoting ur time to the things that do.
It is from the teaching material & I searched online for more info. I find it's interesting but I'm afraid it's too hard to junior high.