The nihilist and the believer ask the same question differently. One says: how is this so messy? The other: how is this so ordered?
The nihilist's only oath—and it is grave—is not to reconcile the demons that taught him to see the world as they see it. It may be true.
His oath is to be kind to the other. And to learn one question more: was it always meant to be this messy?