I used to say (and I do this a lot) 'you can't have everything in life'. I was wondering whether this is a positive thought or not and came to the conclusion that yes, it is. It's about appreciating the things that you do have and accept the simple fact that you can't have, you know, everything. It's like a hunger that never ends, it's always another thing. Think about it when you, for example, have to make a difficult choice between things.