evidence: The pessimist allows problems to rent cognitive space. But why think of problems when you can fill your head with solutions? [...] When you reflect on it, you will conclude that positive folks have almost always been more right than the negative ones. Every tangible item we possess or use was created by someone—somewhere who thought, "Now that’s an idea that’s worth trying." [...] Positive people practice positive expectations. They know that what they think has an effect on their expectations. Myron Trubus said, "There is no such thing as immaculate perception. What you see is what you thought before you looked." Psychologists refer to this as a "self-fulfilling prophecy." If you expect the good to happen, more often than not, it will. And if you expect a bad thing to happen, it often does.