We live in a 4D world not a 3D one. You need 4 bits of information to locate anything anywhere in our universe. 3 physical X, y, Z and then a unit of time. Time is the 4th direction we all move through. A 3D world is lifeless. It's like a 3D photograph where nothing in it changes. You really should try to avoid beliefs and work on gaining actual knowledge. The only way you can gain actual knowledge is by first hand experience. The best way to do this is learning how how to leave your body while fully conscious and do your own investigations. If you haven't done so already, I suggest reading Robert Monroe's books. Staring with his first one Journeys Out of The Body. Knowledge is far more valuable than simple belief which takes no real effort on your part to obtain.