When you pride yourself in knowing more than anypony else in Equestria, besides the Princesses of course, what do you do when you figure out everything? Do you live on, happy about your triumph over ignorance, or do you perhaps evolve into some apothesised being tasked with watching over those less-knowledgeable?

Or does one simply just let go of their mortal life to pass on, to find out the last unknown?

What lies after death?