" Just as our brains can be wired in ways that hold us back, we can retrain them to scan for the good things in life—to help us see more possibility, to feel more energy, and to succeed at higher levels. The first step is understanding just how much of what we see is solely a matter of focus. As William James once said, “My experience is what I agree to attend to. "

― Shawn Achor , The Happiness Advantage: The Seven Principles of Positive Psychology That Fuel Success and Performance at Work