In the deep forest it sometimes appears that there are big palaces and nice cities. That is technically called gandharva-nagara. Similarly, in dreams also we create many false things out of imagination. A self-realized person, or a devotee, knows well that this material cosmic manifestation is a temporary, illusory representation appearing to be truth. It is like a phantasmagoria. But behind this shadow creation there is realitythe spiritual world. A devotee is interested in the spiritual world, not its shadow. Since he has realization of the supreme truth, a devotee is not interested in this temporary shadow of truth. This is confirmed in the Bhagavad-gita (param drstva nivartate).