Leaving the throne room after comforting his Majesty and queens, Robert despite his unwillingness to be a pawn of a god makes his mind to forge his own path onwards. He thinks that the demon race that invades the lands should not blame him for he himself is like them in the sense that they are but pawns.
He thinks that until he is just as strong as his parents he will continue to play this game. He makes up his mind grow strong enough to be able to protect himself and never beg for help from others like his parents did to the god of life.
Thinking of this he finally has a goal he wants to achieve and thus made up his mind to work harder. His parents didn't just leave him with memory of their last moments together but also left in the memory ways in which he could grow. Of course he understood that they wanted to give him the best chance out there so that he can rise in power eventually reaching their plane.
Robert was always smart from a small age and he didn't have any ambition before for he thought that he could live a care free life when his brother became crown prince.