It can fill one's mind with such thoughts and revelations that, similar to prophecy, one is left almost unaware of the physical world. When prophecy was withdrawn from mankind, all that we had left was Ruah haKodesh. Yet, the mental, psychological and holiness requirements necessary to receive this lofty state meant that it could only be achieved by the very few holy pious ones in every generation. There are two other forms of communion with the Divine that are not as overt and recognizable as prophecy or Ruah HaKodesh, but nonetheless are accessible to us all, these are dreams and the Bat Kol. We all know about dreams.
Some dreams have more meaning than others do.
Yet, dreams are always blurry and confusing. Most often, a dream's power is not in what is remembered from it, but rather from what is forgotten. A dream can be compared to an operational command in computer software. A dream speaks to our unconscious mind and directs it how to influence our conscious mind. The unconscious dream thus instructs us how we are to act in a situation or what to think or feel about a certain issue.