Nothing. Dreams seldom if ever 'tell' you anything of significance that you are not already aware of.
A different response:
Dreams are produced by the subconscious mind during specific stages of the sleep cycle. Many dreams are just "brain lint" - they are rehashes of the day before, as the subconscious mind processes experiences and impressions. Other dreams can be "practice" or "rehearsal" of different ways of solving problems. Yet other dreams can involve symbols in which one image represents something else in the same way that the Bald Eagle represents the United States. Most dreams involve purely mental exercises, and it is not important to remember them all.
Some dreams, though, do contain messages that the subconscious mind sends to the conscious, waking mind. Repetitive dreams that occur over and over usually contain this sort of message. Once the dreamer figures out what the dream represents, it stops occurring.
My primary source on dream interpretation is the psychologist Carl Jung. The book listed below is readable and full of insight. I've added two links to websites with far more information than can be included here.
King Arthur's dreams relate to the telling of the story. What happens in his dreams relate to how the story is told. He makes his decisions based on his dreams.
Dream telling, because he rarely has dreams.
Yes....People can share dreams by telling each other about their dreams or by writing about their dreams. It is not possible to "share" dreams while sleeping, in the way dreams were "shared" in the movie Inception. Such ideas have no scientific basis; they are science fiction.
Your subconscious is telling you that you need to begin thinking about your future.
Joseph. See Genesis chapter 37.
The term, "Sweet Dreams" is used when somebody is going to bed. You are telling them to have good dreams while they sleep. This is usually said to someone close or related to the speaker.
This could be considered the power of telling the future.
"Gypsies are famous for their traditions of fortune telling by reading Tarot cards, interpreting dreams, and looking into crystal balls."
Joseph told his family his dreams, and this angered his brothers so much they at first wanted to kill him, but sold him to slave traders instead.
Your appearance in your dreams reflects how you feel inside. Your own mind may be telling you to take better care of yourself while that is still possible.
Write her a note, telling her you like her. If she doesn't like you keep trying and do nice things for her!
In "The Giver," family units have a ritual called "telling of feelings" in the mornings, where they share their dreams and emotions from the previous night. In the evenings, they have a ritual called "telling of dreams," where they discuss their dreams for the future or events of the day. There are also rituals like the "sharing of feelings" where they discuss their emotions openly.