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.
Eyes Body language. The eyes are often called, with some justification, 'the windows of the soul' as they can send many different non-verbal signals. For reading body language this is quite useful as looking at people's eyes are a normal part of communication (whilst gazing at other parts of the body can be seen as rather rude).