Dreams are a reservoir of ...

Dreams are a reservoir of knowledge and experience yet they are often overlooked as a vehicle for exploring reality. In the dream state our bodies are at rest, yet we see and hear, move about and are even able to learn. When we make good use of the dream state it is almost as if our lives were doubled: instead of a hundred years we live to be two hundred -- Tibetan Buddhist Tarthang Tulku from
 Stephen LaBerge

Quotes from the same author

Pause now to ask yourself the following question: 'Am I dreaming or awake, right now?' Be serious, really try to answer the question to the best of your ability and be ready to justify your answer.
 Stephen LaBerge
In the dream state, the only essential difference from waking is the relative absence of sensory input, which makes dreaming a special case of perception without sensory input.
 Stephen LaBerge