"Reality exists because WE exist too."
-Time and Space
Reality is NO different with dreams.
You wake up in a morning and you have remembered your dreams.
What does it feel?
The same feelings that we experience in reality exist also in our dreams. Everything we experience when we are awake also exists in our dreams except for two things. Those things are the only ones that distinguish the other world (dream) from reality.
Time and Space.
Have you ever notice when you suddenly awakened in a very realistic dream and you have said to yourself “It looks like it happens in reality”. Then you’re going recall it and your dream will be nothing but a memory. But two things are missing in that particular event. Even how long you have slept (5, 6, 7 or 8 hours?), your dream just took about 5-10 minutes?
Time does not exist there.
And even you are in just 137x191cm bed, it felt like you experienced that you’re stepping in a whole city.
Space does not exist there.
Dream is a dimensional world where two things - that put this world into reality - do not exist. Whatever can happen to your dream might also happen in this world. And to make it more realistic “somebody” will include “Time and Space” for us to perceive it.