Speaking of context. Often dreams are just dreams. They exist because the brain needs to digest information, and often they're not different from how digital neural network makes a Frankenstein's monster out of the images and meanings from our memories.
But sometimes the brain remembers things _forwards in time_. It may be confusing how the scene is constructed from very familiar ideas and images and visually bears little resemblance to what will happen. The context, on the other hand, is very precise in its symbolism.