Talk is cheap.
Leonardo da Vinci always maintained that actions and body language spoke louder than words; that one's true communicacability manifests itself namely in their hands.
Observer and scientist that he was, he believed that the feelings of a character could be revealed through body movement as well as face and to this aim he advised artists to observe deaf mutes.
"Men of genius sometimes accomplish most when they work the least, for they are thinking out inventions and forming in their minds the perfect idea that they subsequently communicate and express with their hands."
- Leonardo da Vinci , In Education/Genius