The surgeon did not believe that surgery was necessary as Ceri's symptoms are resolving themselves,

We believe in resolving all disputes peacefully.

The oppressed never free themselves - they do not have the necessary strengths.

We have a process for resolving the differences -- or not.

You cannot drive the car if you do not have a driver's license. You cannot do brain surgery if you are not a brain surgeon. You cannot even do a massage if you don't have a license.

The surgery was enhanced as a result because the surgeon was able to make a larger incision to relieve pressure. It allowed her to remove a larger portion of a tumor.