In this paper, I propose a critical analysis of William James and Alfred Schutz’s theory of multiple realities. I try to demonstrate that among the various issues concerning this theory, the most important ones concern the question of reality within another reality and the gradual transition between different realities. The basic idea is that just as reality has lost its character of uniqueness, similarly the subject is faced with the shattering of its identity. This will allow me to criticize the idea of ​​static nature of the theory of multiple realities as separate entities and as closed universes to demonstrate that the different realities are connected thanks to the subject who lives and works simultaneously in multiple dimensions.