This phrase – you have to dream – was uttered during a consultation in a sculpture studio, as an encouragement to think beyond the possibilities available at the time, i.e. not to resign oneself to the given situation.
Beyond the specific meaning, the juxtaposition of these two words is interesting in itself, since usually a dream is something that cannot really be influenced, the dreamer cannot control the action of the dream, and is not even aware that he is dreaming, however unrealistic it may be. The exhibitors seek answers to these questions.