The face speaks
Facial expression translates the thought or feeling deep inside a person into something readable by an observer. On the other hand if you think about our physiological growth, we all developed our senses in a specifical order, starting from hearing. Listening is far from there. Touch, feeling, sight and sense take the precedence! They are all senses that enable us to recognize and interact with the world as to what we like and what we do not like. It is not surprising when a baby in a cot smiles back at a smiling face and begins to cry in front of an angry face.
Essentially, we learn to react to what we see and feel first rather than what we "hear". In fact, language is a layer of communication that has evolved after hearing, which requires the use of the grey matter of the brain, while "feeling" is part of the reptilian part of our brain: an instinct, a sixth sense.
When we receive a verbal message, we always interpret it whilst being accompanied by different non-verbal language that we process unconsciously, that is what we report as a "sixth sense". In reality, it is not actually an abstract or paranormal perception, we simply decoded signals of the face based on our previous experience.
This step is essential to achieve effective communication, and, as you may have guessed, requires a journey of personal growth and not a just voice.