In the philosophical and psychological tradition, the concept of imagination is associated, first and foremost, with the human mind’s ability to intend and depict to itself objects that are not directly present before it. In contrast to sensory perception, imagination is often linked to a spectrum of mental states—such as fantasy, hallucination, and dream—that are freed from the burden of factuality and the logic of what is possible within its bounds. Such states are typically of interest because of the creative—sometimes anomalous—potential they hold, even though they are generally understood as secondary additions to the project of human knowledge.
Imagination—in all its material expressions—not only presents us with spaces of unrealized possibilities but even with ones that cannot be realized at all in reality, and in this sense, they are beyond reality, "outside," or "above" the real. Thus, in its literal sense, imagination is surrealism.
Once we recognize the imagination’s potential to challenge the existing order, it is no longer possible to think of reality and imagination as two entirely separate domains, and the question of the interaction between them becomes more pressing and clear.