Here's an overly simplified example. I was once driving with a friend and had to make some quick moves to dodge a car that was swerving right next to us. I may have shouted some things, so my friend gently touched my elbow and said, "Crystallin, what if there's a bee in the car?" Her brain was generating a reality where people are mostly reasonable beings, so their behaviors probably have reasonable explanations. My brain? Let's just say it was not quite so generous. Even if there was no such insect, witness the remarkable difference in our experiences: my friend was calm, amused, open, patient, even kind. I was a hot, steaming mess. Which would you choose?