Ever look through a window? Of course, in all likelihood, you have.
Have you ever heard of a Johari window? Most likely not, but some of you may have.
As written in the Wikipedia article, the Johari window is “A cognitive psychological tool created by Joseph Luft and Harry Ingham …” In the Johari window, there are things known to you but not known to others; there are things known to you and known to others; then there are things not known to you but known to others; and, finally, there are things not known to you and not known to others. Here, take a look at this Johari Window web page courtesy of noogenesis.com.