I was born self-confident. I'm truly not sure why. I lvied through extreme abuse for 42 years. My daughter tells me I'm a very humble person. A good few others (some readers, included) tell me I'm arrogant.
They tell me I'm arrogant because I tell them they're dead wrong. They are. :) That's after listening to what they have to say. Of course, sometimes I don't have to listen to what they have to say. If they tell me they think climate change is a hoax or Donald Trump is a good person, sorry, I think they're dead wrong. I'm not wasting my time listening to them.