Theisio was at no point able to pass through the energy barrier. The cemetery of the giant struck fear into his heart. As the pope, he knew that the Lord of Glory was but a level 15 god, whereas there were beings above level 15 found within the cemetery.
If those things were to awaken and leave the cemetery, they would wipe out almost all traces of the Lord of Glory's powers on that plane.
Theisio believed without a doubt that the Lord of Glory would eventually become the highest god. As the pope, it was his duty to spread his teachings, and he would give everything he had to see that accomplished.
But, of course, doing so had its perks. The pope of any god would without a doubt be granted the right to enter a divine kingdom after death, and a fine position would await them there.
Theisio did not fear death in the least. What he feared was being unable to see through his responsibilities as pope before he died. That would anger his god immensely.