Perspective

The greatest enemy of knowledge is not ignorance; it is the illusion of knowledge
~Stephen Hawking~
 
In other words, you can't know what you don't know until you've been enlighten of your ignorance.

Perspective is the lens through which an individual sees the world. It's a unique set of glasses, custom made for you and by you, through compiling all your life's experiences. 

Our whole perspective of life is unique to us as individuals, but we also share aspects of our perspective with others.

An individuals ability to receive new information outside of their own perspective can be the key to a successful and happy life.