"I'm different from everyone else."
If there was one thing that everyone had in common it would be that they'd either faintly or directly feel that they were different from others. That they were special and unique.
Indeed, not a single person would be identical in talent, education and environment. But while differences helped make the world varied and colorful, it wasn't always a good thing.
When people too stubbornly focused only on themselves, they'd be unable to see the truth for what they really were, blind to other people.
"I'm different. I was born above others. Commoners' lives don't have any value compared to mine. They should dedicate their lives to me."