transcribed excerpt:

"As some philosophers have pointed out, metaphor is how we understand everything. And they point out that, actually, particularly scientific and philosophical understanding is mediated by metaphors. In other words, the only way we can understand something is in terms of something else that we think we already understand. And it's making the analogy, which is what a metaphor does, that enables us to go "I see, I get it." Now if you think that metaphor is just one of those dispensable decorations that you could add to meaning - it's kind of nice but probably a distraction from the real meaning - you've got it upside down. Because if you don’t understand the metaphor, you haven’t understood the meaning. Literal meaning, however, is a peripheral, diminished version of the richness of metaphorical understanding."