Face Not Mirror of Personality

Face, It shows many things. For example, It shows sadness, loneliness.
But, face doesn't show personality.
My face shape is wide forehead and square chin.
The book says "people with wide foreheads and square chins are intelligent and work hard‥‥ They can be calm and quite, or they can be opposite, too."
Yeah. In my case, that is true.
My fater shape is the same me, and that is true for him.
But, my brother isn't.
My brother shape is square face.
But he doesn't make decisions and keep promise.
My freind face shape is round.
The book says "People with round faces are very intelligent, and they prefer to work with brain instead of their body. People with round faces are confident and usually live a long life."
However, my friend with round face isn't intelligent.(I'm sorry to my friend.)
She prefer to work with boby instead of her's brain. Also she is shy!
Face relates personality isn't true.
This is the same assumption that a type of blood relates person'character.
Parents' appearance are inherited, but personality isn't inheritied.
Personality relates not appearance but background.