People seldom can see what is right in front of them. Why? Because you are bombarded with stimuli that tells you what you should believe.
BEFORE YOU READ FURTHER LOOK AT THE ATTACHED PICTURE AND DETERMINE WHAT IT IS THAT YOU ACTUALLY SEE.
That face and the expressions it is exhibiting are saying several things at once.
First, the maniacal smile explains the extremism associated with this individual. The unnatural smile contradicts the hidden eyes. The eyes tell you that she doesn't believe the expression/emotion she is selling. But she believes she can deceive you. That is all that matters. She knows the truth but you cannot prove the truth. So, to her, the truth doesn't exist.
It goes without saying that this inherent contradiction and incongruence is a mask. Why does one wear a mask?
Imagine what she might look like if you were to take off the mask.
What do you see?