[...] PERSONAL model. This refers to his awareness of language as a form of his [the child] own individuality. In the process whereby the child becomes aware of himself, and in particular in the higher stages of that process, the development of his personality, language plays an essential role [...] The child is enabled to offer to someone else that which is unique to himself, to make public his own individuality; and this in turn reinforces and creates this individuality.
- Halliday (1973), a pag.14