Lots of great examples here. E.g., ideas are food (raw facts; a half-baked theory; let an idea percolate; devouring a book) and theories are buildings (ideas need a foundation and support; construct a theoretical framework; buttress an argument), etc. (via). Makes me think of George Saunders:
When we get better at expressiveness, we get better at understanding, better at sympathy, better at bullshit-detection, better at experiencing pleasure, better at true engagement (with others, with the world, with ourselves).
Update: I think this is one reason I love learning about the history of a word. Like when I learned the word raga is related to the Sanskrit word for dye (the musical form colors your mood!), or when I was reading The Gift of Fear recently and learned that intuition has roots in a word meaning protection, defense, guardianship (you trust it because it has your interests at heart). Learning where a word comes from, like metaphors, has a way of changing your perspective or giving you another lens to see language through. And yeah, I just used two metaphors to explain how etymology is like a metaphor. Boom!