The human mind wants certainty where there is none. So it constructs some formula through which it justifies its chosen path as rigid certainty: The storyline one’s ego-mind has chosen to believe is absolute truth. Anyone who doesn’t agree, who doesn’t embrace the same storyline, or who actively disagrees is seen as a threat. Once the ego-mind has attached itself to a particular belief system, the belief system becomes a major facet of the ego’s identity.
— John E. Welshons