think about it, from a nonindoctrinated view. if there is no empty space, what is between you and i? what flows through everything and is conscious of itself? science is just realizing that this not empty space is conscious. its knowing. its the fibers that weave reality as we percieve it. our eyes can only hear a certain decible. our eyes can only see a certain level of vibration. could it be that other realms are in the same timeline mixed with ours, but cannot be seen or heard? how can dogs and cats hear and see things that we cannot? everyone is different with their personal beliefs of who or what they pray to. i am not critizing that i am sharing what i have learned along my journey. the information is there to be learned. one just has to ressarch. here this will get you started:
https://youtu.be/llmNKanN9uY

"Ccould it be that other realms are in the same timeline mixed with ours, but cannot be seen or heard?"

You realize we have instruments to measure and visualize the remaining energy spectrum, right?

Wifi, G4, G5, broadband radio, infrared cameras, X-Ray machines are all examples of us utilizing parts of the electromagnetic spectrum that we can not see or perceive. But we know it's there because we measure it, and we learned to work with it and build useful technology from it.

https://en.wikipedia.org/wiki/Electromagnetic_spectrum