Watching tropical fish swimming in an aquarium lowers blood pressure and heart rate. People have been known to adjust their eyesight to near-sighted, farsighted or normal, changing the eye's curvature very quickly so that an optician would write a different lens prescription. You might have guessed all these have been confirmed by research except for 5. You may look twice at this heading if you have been used to thinking of beliefs as simply either true or false. NLP suggests that it is useful to replace the idea of beliefs with the idea of 'presuppositions'.
Presuppositions are principles of action.
They are like beliefs, but you choose them. They do not know if they are true or not, but you act as if they are true and pay attention to the results you get. This is quite reasonable because we never really know if what we believe is true - but the consequences are real enough. You keep presuppositions for as long as you get results that enhance your health and well-being. You change and modify them when you do not get results you like.