This is the simplest way to put it, you are what you think you are. If you think you are the best, then you are the best, it’s indisputable. If you think you are dumb and incapable then again it’s true.
You just are whatever is your opinion of yourself. Regardless of what others think of you. Your opinion of you is all that matters.
The society can think whatever it may of you and your abilities and none of that matters. Because you know society is flexible, today it thinks something, tomorrow it thinks something else. You can’t hold society accountable, all you can hold accountable is yourself.
You can be different and that’s fine, you can be wierd and that’s too is fine. If you think you are fine, it’s all fine.
Don’t let anyone determine your opinion about yourself. Because you are what you think, not what someone else thinks.