At the end of WoR Jasnah says that "God is dead" and Hoid responds something along the lines of "I think you'll find that he lives on in the hearts of men". Jasnah finds that remark very clever. It is my theory that part of Honor's trap was placing a tiny pieces of himself into the people of Roshar, (kind of like Preservation placing pieces of himself into the people of Scadrial) thus somehow insuring that the prison will stand even after he is dead. This would explain why Odium is playing such an active roll in the utter destruction of Roshar (contrary to his pattern of coming, splintering the shard, then leaving): to completely free it of the influence of Honor and the power that holds him captive.