Sometimes, a treatment, or sleep ritual would be worked up to help incubate good dreams. Dreams often told a prophecy. The Romans had similar beliefs. Usually the answers come from ancestral spirits. Muslims -dreams and astrology are closely related in this culture.
True dreams come from god, false ones from the devil.
Visions can also be sought after in the hopes of answering a question or resolving a conflict. These obstacles can be in the form of forgetting the content of a dream, being uncooperative in analysis, censorship in what they do say about the dream, and other forms of resistance. It is also important to realize that there are two levels to every dream. The latent content is the one that is important for understanding the unconscious conflicts that the dreamer is experiencing. The latent or hidden part is where the greatest understanding can be uncovered.