When stressors or unexpected events occur, are you able to think about them in novel, creative ways, or even to change your stance, outlook, or commitment? Mental health is simultaneous success at working, loving, and creating, with the capacity for flexible, mature management of conflict between instincts, conscience, important other people, and reality.
Flexibility in this sense is not multi-tasking, which is the presumed (and unproven) ability to switch between two concepts while simultaneously thinking about other concepts.
Face facts, and accept reality as new experiences and knowledge unfold. Strive to create around you an atmosphere where individual differences are appreciated, rules are flexible, communication is open, and mistakes are learning opportunities.
An open mind and flexibility are essential in every search for truth.