It's possible that the more dreams you have, the more likely it is that at least one of them will come true. The most common reason people have many dreams is because they're very interested in what will happen next in their life. If you think about it, dreaming is like planning ahead. It's unlikely that you'll get sick or injured while you're asleep so thinking things through gives your brain a chance to work out future scenarios that may not have crossed your mind when you were awake. People who have recently lost someone close to them often report having dreams about that person later on. This is probably because your brain needs time to process what has happened before it can move on. During our dream periods, our minds are free to imagine anything, which is why these dreams are called "vivid" dreams. Finally, some people claim they can tell how they are going to die from sleeping alone. They say this death vision appears in their dreams and that they know it is going to happen. There are several theories about why this might be so.