What happens when you put mirrors on a house in the dessert. As we understand more and more the human mind we have been able to both experience illusions but also understand them and enjoy them. In this way...we can manipulate illusions so that we participate in meta-illusion (knowingly allowing yourself to be deceived). In the last century we have gained sophistical knowledge on how we fill in missing information or irregularly process sensory data with visual illusions, especially with geometric forms, psychological illusions, like mirages and drug trips and existential illusions like remarkable coincidences and strange events taking place simultaneously.
Religion thrives on illusion yet once we over come them...it doesn't mean we have to give them up. In stead of casting aside illusions (especially superstitious illusions) we have harnessed them to provide entertainment and also gain greater control of physiological problems (pain), psychological problems (phobias) and even learn (holographic simulations). The pictures of Escher, discussing existential problems instead of inventing answers like the possible illusions of free will and qualia, browsing websites with enjoyable geometric illusions, real life illusions, inducing a sense of fear through extremely sophisticated make-up psychological-narrative and atonal-music are a few examples.
Taking control of illusion empowers us, not only to escape the cycle of superstition and dogmatic knowledge...but also to understand the mind and psyche as well as enjoy knowingly being tricked by well created deception.