The Johari window is a psychological tool that looks at self-awareness, specifically mapping awareness of our idiosyncrasies into a matrix of four blocks:

1) that which is known by ourselves and others,

2) that which is known by others but we don’t know it about ourselves,

3) that which we know about ourselves but others do not know, and

4) that which neither others or we ourselves know about our personality/behavior.

The reason I include this in a proverb is that self-knowledge is fundamental to wisdom.

For more on this check out the short video below: