“Language… makes parts of our known experience more shareable with others….
It permits two people to create mutual experiences of meaning …
but in fact language is a double-edged sword. 
It also makes some parts of our experience less shareable with ourselves and with others.”
         
“The problem of language acquisition has become an interpersonal problem. 
Meaning … is something to be negotiated between the parent and child…
Meaning results from interpersonal negotiations involving what can be agreed upon as shared.”

The Interpersonal World of the Child (1985),
by Daniel Stern, MD