Just who is Nohodon exactly? He has to be something more than just a previous King. After reading the epigraphs again, I realized Dalinar did the exact same thing as Nohodon. He gave it up and walked away.
"First, I dared not tell them this dusty traveler with whom they shared a meal was in fact that very king they had heard of. The second was that I did not explain that very king had abdicated his throne and walked away from his kingdom."
"I do not have answers, and there will always be some who denounce me for this decision I made. But let me teach a truth here that is often misunderstood: sometimes, it is not weakness, but strength, to stand up and walk away."
"May you have the courage someday to walk away. And the wisdom to recognize that day when it arrives."
It makes me wonder if he's actually another shard or something. Maybe it has to do with the 4th moon that hit Roshar? The final scenes with him and Dalinar have to be proof of him being something more than just Dalinar's mind manifesting him.
It's touching to see how important The Way of Kings was to Dalinar. I guess in the end there words and choices he needed were in the book after all.