Body language provides a whole host of clues concerning a person's attitude, thoughts and feelings.
For example:

The 'lifted chin' is widely observed indication of arrogance and self importance; stemming from status insecurities, and the need to project an air of superiority.
By over-compensating, the person quite literally is forced to 'look down upon' other people.

This same trait is discernable in the 4-by-4 car craze, which enables the emotionally insecure individual to hide within the armoured shell of enormous vehicle, elevated above other motorists.

There are countless examples of easily observed body language, and we are all pretty adept at unconsciously picking up on non-verbal clues.
Further research is advisable.