Nowadays, beliefs rule the day. "Personal truth" is more important than "the truth." In one study, more than 91 percent of the respondents couldn't tell the difference between opinion and fact. For them, in other words, opinions are facts and beliefs are truth. In Believing is Seeing, former ABC News Science Editor and Harvard physics instructor Dr. Michael Guillen explains how every aspect of the human experience, from science to religion, is powered by one thing: faith. That includes your worldview. Powered by faith -- by beliefs you can't prove -- it dictates how you see everything and everyone, all the time. Believing is seeing. Are your beliefs true or untrue? Is your faith enlightened or misguided? The answers to those questions reveal whether your current worldview is dangerous or dependable. As Dr. Guillen explains in the pages of this book, what you believe is not just a matter of what's true or not true; it's a matter of life and death--page 4 of cover.