The quote “there is a fine line between….”

That could be used on a multitude of different similarities i.e. insanity and genius, optimism and delusional, stubbornness and determined, and my favourite arrogance and self-assured. Lets get the definition of both of them, arrogant ˈadjective Having or revealing an exaggerated sense of one’s own importance or abilities. self-assured ˌadjective Confident in one’s own abilities […]