We don't see the world as it is; we see the world as we are...if someone has a critical eye, they will always find something to be critical about. And if they have a grateful eye, they will find something to celebrate even in the worst of circumstances...Having a "good eye" in life changes how you see yourself and everything around you... your focus determines your reality.
Mark Batterson, A Trip Around the Sun: Turning Your Everyday Life Into the Adventure of a Lifetime
attitude, perspective