By using our imagination, we are priming our brain to be in a positive place. We will feel what it is like to succeed, feel what it is like to attain our dreams and goals through our imagination.
And in turn, because we have told our brain this is what it feels like to do an activity, to succeed, because we have had a dry run through imagination, we are more likely to succeed when it comes to the real thing.
But, if we imagine ourselves failing, worry about failing, we will prime ourselves to fail, because we have told our brain that we will not succeed easily if at all.
So make sure to always think about things positively, imagine yourself flying and succeeding. Prime yourself to succeed rather than to fail.