People often assume that metaphors are merely optional figures of speech whose purpose is to enliven expression and make it more poetic and appealing. The common assumption is that we could speak literally, but its more colloquial and comfortable to use imagery–unless we’re trying to be precise, in which case metaphors muddy up the idea being expressed. But according to research in neuroscience, cognitive psychology, and linguistics, metaphors are not just words or images that help describe a concept that already exists in the mind. Instead, metaphorical connection is the way the human brain understands anything abstract. The deepest metaphors are not optional or decorative: they’re a kind of sense, like seeing or hearing, and much of what we consider to be reality can be perceived and experienced only through them. We understand almost everything that is not concrete (even “concrete” is a metaphor) in terms of something else. In short, the expansiveness of our metaphors determines the expansiveness of our reality.
Joel R. Primack & Nancy Ellen Abrams
The View from the Center of the Universe: Discovering Our Extraordinary Place in the Cosmos p. 243
An apt reversal of Wittgenstein. Our language is limited only by our ability to create metaphors. Literature expands reality. We have the neuroscience to prove it.