I would say this theme is universal. That is because of the significant difference between the two ie imagination and reality. Reality is the way things actually are, in fact and it can be called hard reality because it can be difficult and require a lot of hard work to make it successful and sacrifice, whereas imagination is or can be wondering how things are in say another place or in the future and it may or may not reflect reality. On the other hand, visualizing how one would like things to be can be a powerful tool to make them actually happen that way.,
