I'm irritated when people say that know me completely well, have studied me. And even if it's connected with another person, not me. Because... it sounds like a nonsense for me.
A human like a sea... if a bird will fly above a sea and will be reflected at its surface, will you know about it? Maybe. If you will be near. But will you know about all birds which fly above a sea? No. Never. Because you can't. And if someone will throw a flower or a jar, will you know about it? Only if it was done near you.
So, you never know people entirely. Because... you can't. And if you think so - you are mistaken.

Translation (Russian, oh yeaaah))