The neurological equipment devoted to threat is five times more than that devoted to reward. But threat today is very different from what it was during most of human history. Hence, our brain is scanning for threat five times per second and when it perceives threat it cuts off engagement to the frontal lobes. The frontal lobes must be engaged to re-discover our true self. This tendency can be re-wired but it requires that we follow the pathway to our truer self.
(By the way, the brain is also five times more likely to recall negative than positive experiences.)