the proof of the pudding (is in the eating) in British English.
The windows to the soul. Your eyes communicate more than you may think -- and you canât always control everything they reveal. Body language experts tell how to read a personâs eyes to tell if theyâre happy to see you, disgusted, bored, stressed and even lying. Pupil size.
The human body is an indicator of whatâs going on inside the brain. Seeing things like nervous twitches or facial expressions are great ways to get some indication as to whatâs going on within the brain. You can see stress, discomfort, concern, worry, or even when someone feels unsafe by the way they act.