Commentary
The story has a complex view of the relationship between body and mind. The mind and body are intricately linked. Indeed, the mind can make a body different. Thus, Hyde must have his own distinct body; he does not merely "take over" Jekyll’s body. On the other hand, before the experiment, Hyde and Jekyll both live in one body. Or, perhaps they are not two minds, then, but two aspects of one mind. Stevenson does not try to resolve these complexities so much as make them available. His story is primarily a critique of non-rational science.