I encourage you to watch these two minutes of a young child in a human behaviour study:

Experimenting with Emotions

There is nothing new about it, we all know or should know that not only our language and the tone with speak have a big influence on our children, but also our thoughts and the feelings we don’t express. This little experiment focuses on only one aspect – but we can take this much further and see it in the relationship between teachers and students; any interaction with family, friends or colleagues. What is the tone of your voice? Where are your thoughts when you speak? What are your emotions, expressed or suppressed?
Do your words and actions increase love and well-being – or fear and lack?