Topological mathematics developed the Klein bottle in the 1900's, a three dimensional bottle in three dimensional space that only has two dimensions. All but a few theoretical mathematicians let the concept go. Now, however, two hundred years later, the Klein bottle resurfaces. Scientists have found what appears to be the outer limits of our universe. Mathematicians have plotted its configuration to be an exact replica of the inside of a Klein bottle.
Most bottles are three dimensional and have an inside and outside.
The Klein bottle, however, is a three dimensional bottle having only two dimensions. A Klein bottle appears to those on the outside as having no inside. On the other hand, to those inside, the Klein bottle appears to have no outside. The universe surrounded by God is like a bottle that, to someone outside the bottle, appears to have no inside and to someone on the inside, it appears to have no outside. To God, the bottle appears to have no inside.