6dc5455c____The_Coppermind___17th_Shard__Entry
[Chapter] 53 [Entry] 
The pact between Preservation and Ruin is a thing of gods, and difficult to explain in human terms. Indeed, initially, there was a stalemate between them. On one hand, each knew that only by working together could they create. On the other hand, both knew that they would never have complete satisfaction in what they created. Preservation would not be able to keep things perfect and unchanging, and Ruin would not be able to destroy completely. Ruin, of course, eventually acquired the ability to end the world and gain the satisfaction he wanted. But, then, that wasn't originally part of the bargain.
The Hero of Ages/Epigraphs - The Coppermind - 17th Shard
Entry