Illustration
Imagine a pencil point touching a piece of paper. In the two-dimensional world of the flat paper, only the point of the pencil can be experienced. So it is with God and the spiritual world He inhabits, limited as we are to three dimensions, we can not fully understand God in all His dimensions.
The explanation of the 4th dimension by Carl Sagan may help in understanding how the spiritual world can exist and we not recognized or understand it, but have some confusing experiences as we encounter it. Substitute God for his “three dimensional creature” in the following video: