Studies have been done in the past and have proven beyond doubt that a person who has a more positive outlook will tend to have better luck and will generally be a happier person; where as a person with a negative outlook will constantly have negative events take place around them.
The only explanation scientists have ever given for this is to say that the average human only uses 10% of the brain and that the explanation for these events is hidden in the 90% of the brain we do not use, and that maybe if and when we learn the secrete for unlocking these areas of the brain we will then be able to get a better understanding of how all types of psychic predictions work.
But until then all I can tell you is that if you believe that the prediction will come true then it will come true.