I believe this. My brother knew (& said it on occasion) that he wasn't going to live to see 21. He died when he was 18. I believe in having dreams that are warnings too. Once I applied to rent this really old old house on a huge block, it was so cool. But I had dreams of someone chasing me through that house with a knife and trying to kill me three nights in a row until I withdrew the application, and the dreams stopped.