Is there any substance to the world we enter when we dream?

Question

What is this world we go to in our sleep? How does it work? What is it's purpose? Why do we go there? Is THIS why we sleep? They say they still don't know why we need sleep, is it because we need contact with the Dream Universe?

Answer 1

We need sleep to recharge our body, for it to mend, and grow. Dreaming takes all the thoughts you were thinking and burns them out of your system. If you didn't dream you would be very cranky.