In addition to social language, from a very young age, we speak alone with ourselves. Jean Piaget, observing his three children, was one of the first researchers to document that children happily talk to themselves.
He realized the importance of talking to oneself or interacting with imaginary interlocutors during childhood. Children begin to show these behaviors around the age of 3. They clearly display satisfaction and pleasure by talking to themselves. They keep cheerful and private speeches out loud in which they ask and answer themselves regardless of their surroundings. Even when they are not alone, they speak on their own without worrying about being heard or understood.
In adulthood, private conversations help us to regulate ourselves and guide us to pursue goals, overcome challenges, and resist adverse circumstances, especially when we feel our emotional stability or our security is endangered.
In addition, private language can be very effective when it comes to meditating and achieving healthy states of relaxation, tranquility, and peace of mind through internal reflections.