Optimism—not only feeling it inside but showing it on the outside—is a magic move. People are automatically drawn to the confident individual who believes everything will work out. They want to be led by this person. They’ll work overtime to help this person succeed. Optimism almost makes the change process a self-fulfilling prophecy.
I love this -- optimism as a self-fulfilling prophecy. It reminds me of Steve Jobs' fabled "reality distortion field."

