Meh, i think seymour just tryed too do what ALOT of villians are attempting just recently, *cough* ffxiii-2, naruto ect. *cough*, and thats just destroy everything so there is nothing = no suffering.
A selfish way of removing his own suffering, but also a big headed over powered maniac that thinks hes a god that needs too "save" the world by destroying it. Which in the latter sense makes him selfless.