I wonder if you might demonstrate your ability.
Maybe you could use something like leprechauns to demonstrate your technique. According to the Encyclopedia Britannica, a leprechaun is "a fairy peculiar to Ireland, who appeared in the form of an old man of minute stature, wearing a cocked hat and a leather apron." and who stores away his gold in a pot at the end of a rainbow, and if ever captured has to grant three wishes to the person who captures him.
So, assuming that you don’t already have a belief in them, how about right now, while you are reading this, CHOOSE to believe - be convinced without a doubt - that they exist. Now that you believe in leprechauns, my question is, how did you do it? How did you make the instantaneous transition from lack of belief to belief?