“Just be yourself” is an idiom that means that one shouldn't try to fit in for the sake of fitting in against one's own better judgement. Where the fuck does the author get this?: This might be the dumbest thing on the internet, and I want my three minutes back, Salon.A man who knows himself is someone who is dead certain of what he wants and makes all his choices – about career, mate, income level, spirituality, politics – with a view to acquiring it. A man who knows himself is one who cannot entertain the idea that he might be wrong, or that there may be two or more viable ways of interpreting an issue or solving a problem. A man who knows himself projects that arrogance into his judgement of others, and formulates opinions about them that are almost inescapably ill-founded and unshakable.