You can "think outside of" it, or a group of opera patrons can be held in it
[DOC] [TLE] Senza 0203 - International Conference of Symphony and Opera ... [PAR] A meeting of the ICSOM President's Council was held on Sunday evening in 
advance of the media ... is a group of senior staff members of North American 
orchestras and op- ... ing alone cannot accomplish nearly as much as they can by 
acting together.