If you want to understand how are brains work try the book "Righteous Minds". We all react emotionally first then use our intellect (rational side of our brain) to rationalize our response. With time we can alter our emotional response, or manage it first, but it takes understanding how we function to do it well. We also build stories to explain our world, and like all stories/myths, our stories are often inaccurate and always incomplete. I realize this is an attempt to condense an entire book, actually several books, into a paragraph so it is not a very good story I am presenting to you.