In my experience there is no such thing as imagination - at least the kind which is an illusion. Imagination as I experience it is a very real thing: pack with power and insight. In fact I would go as far to say that what we call "imagination" is simply the screen through which we are able to see and feel the things that the five senses can't and thus it opens up our range of possibilities. Imagination makes us the pioneers of unexplored territories.
A different type example - until recently in the concept of a "Black Hole- a zero gravity space which is a gateway to a different time and space" was laughed upon in the scientific community. Supposedly it was a figment of imagination. And then Viola! the sci fi movies- said to be based in fiction turned out to be AHEAD of the scientific community. How? Because it uses imagination freely and is not bound by the same restrictions of "normalcy". Imagination is a tool for seeing through you third eye into times and space that are not visible from the first two set of eyes. It enables us to feel and intuit things are not bound by the constraints of the physical reality. The evolutions of the self is accelerated by using imagination- and rest assured as we have noticed time and time again... the scientific proof follows sooner or later.
Then again, why would so many cultures, spread out across the world all have some form of mysticism that accounts for higher beings such as angels, daikini, gods and goddess etc. Where did these conception even come from? It is some thing that we have been connected to from the beginning. Now the story behind who these beings are and whether they truly are gods etc. is a little bit complicated, however, just by tuning in upstairs and critically evaluating the data we pick up gives us first hand experience of knowing our true history. In my opinion, this beats the "bookish knowledge" deciphered by someone else.
The way into connecting with your higher self, and higher wisdom is through a process that resembles closely what we call imagination, we have to dare to dream and refrain from invalidating our visions too quickly. The highest of intelligence is ours to have, we just have to tune in. And now is the time to know ourselves more than ever.