Fourth Window

One of my close friends used to say that my fourth window seems to be big. But i feel the same for the second window.
For those who couldn't understand what am talking about, here is the explanation. This is not something defined and stated somewhere but it is something which we both(me and my friend) used to discuss about, most of the times. This is about a person's personality.

Every person has four windows to his/her personality.
First window tells what you know about yourself and what others also know about yourself. Second window tells what you know about yourself and what others doesn't know.
Third window tells what others know about yourself but you doesn't know.
Finally, the fourth window tells what you don't know about yourself neither do others.

To me, second window is very much interesting and i like to keep it big. That doesn't mean that am an introvert. At the same time am not an extrovert too!!
What i know about myself and others dosen't know is lot more compared to what others know about me. Thats what i feel atleast. And i wish to be like that. There are hell lot of things in my life which i never shared with anyone. I have very less number of friends whom with i share most of the things, if not everything. But none of them know me enough, neither do i except them to.
What others know about myself and i doesn't konw... only others can tell about this. Most of the things that i hear from others about me... i already know. So that doesn't come here. Till now noone said anything about me that i doesn't know. Am still waiting to know about my third window... so that i know myself better!
What i know about myself and what others also know... nothing much to say about this as everyone knows ;).
What i don't know about myself neither do others... can't say anything about this as this is about what i don't know about myself :).