In the act of writing, the writer externalizes his or her thoughts. The writer enters into a reflective and reflexive relationship with the written page, a relationship in which thoughts are bodied forth. It becomes difficult to say where thinking ends and writing begins, where the mind ends and the writing space begins. With any technique of writing - on stone or clay, papyrus or paper, and particularly on the computer screen - the writer comes to regard the mind itself as a writing space. The writing space becomes a metaphor, in fact literate culture's root metaphor, for the human mind.