This paper discusses the manipulation of mental representations, parti
cularly in relation to the psychoanalytic concepts of conscious or unc
onscious fantasy. A distinction is made between the unconscious phenom
enal (experiential) aspect of representations and the nonexperiential,
quasi-structural aspect. The concept of the representational world is
described and elaborated, and its development is seen as a consequenc
e of the infant's interaction with itself and the external world. Proc
esses such as identification and projection can be seen in terms of ch
anges in self and object representations, and the same is true for all
the mechanisms of defense. The content of unconscious wishes is trans
formed, by use of such mechanisms, into representations that are accep
table to consciousness. Major transformations of unconscious represent
ational content occur in the process of creating unconscious (preconsc
ious) fantasy, and further transformations are frequently needed befor
e such (preconscious) fantasies are permitted access to consciousness.
The concept of projective identification is considered in the light o
f the ideas put forward in the paper.