Some researchers believe that dreams have no real purpose while others think that dreaming is essential to mental, physical and emotional well-being of a person. Sigmund Freud's theory of dreams suggests that dreams represent a person's unconscious desires, motivations, and thoughts. some dream experts say that we dream because our brain is trying to interpret outside stimuli, while another says that dreams "clear up" the mind for the next day, and in another theory it says that the dreamer is able to make connections between different emotions and thoughts and emotions in a safe environment.
