Berk
The relationship between a believer and their patron god is a symbiotic one.
The worshipper's prayers embolden the divine through the strength of their faith, and in turn, the Gods allow the worshipper to borrow a portion of their power to protect themselves or conduct crusades in their name.
This means the stronger one's faith in their God is, the more power they are able to call upon.
That's is why oftentimes these great Divine beings go out of their way to reaffirm their worshipper's faith in them even if it means lying or using other duplicitous and nefarious means.
The original treaty was put in place to limit the power of all these divine beings at least within the Origin world and allow for each generation to grow up unsullied by facetious rhetoric that is created to indoctrinate mortals since birth and keep them appeased.