4. Grandiosity
This is like wildly, outrageously high self-esteem, typically unfounded in reality. Oftentimes, people will see individuals who take street drugs experience this heightened sense of self-esteem, but in Bipolar Disorder, this state of grandiosity is all-natural.
It is unfounded, oftentimes annoying, though on occasion it may be amusing or light-hearted (though this is typically more of a hypomanic state), and can lead to dangerous, unrealistic, even random pursuits. Maybe Joe thinks to himself one day (out of the blue) that he is the best guitar player in Texas and could be famous world-wide, so he takes off on a road trip to Nashville, Tennessee to gift his talent to the world.
He may play guitar, but he is no professional. While, the mental state in and of itself does not hurt anyone, the ideas and actions that build off of it very much can and do oftentimes. They also may speak condescendingly to those around them, assuming their high-and-mighty, unfounded state.