How does Dean Koontz use imagery in Cold Fire?

Imagery:

"Life... it's like gettin' a blueberry muffin in a coffee shop when what you ordered was the apricot-nut. There aren't any apricots or nuts in it, and you can get tied up in knots just thinkin' about what you're missin', when the smarter thing to do is realize that blueberries have a nice taste too" (Part 1, pg. 81.)

"Snuggle down in my cocoon, be a butterfly soon" (Part 1, pg. 199.)