Imagination

To realize is to make an imagined thing real or concrete to oneself, to grasp fully its implications, to realize the extent of one's folly. Imagine, conceive, conceive of, realize refer to bringing something before the mind. To imagine is, literally, to form a mental image of something. To conceive is to form something by using one's imagination. The world view is the result of arranging perceptions into existing imagery by imagination. Imagination is needed to make sense of perceptions. Without imagination man would still be...well, that also takes imagination!