Take a look at what makes great quotes tick. Immortal expressions use a combination of tricks to make words go viral. They're all based on "memory keepers": parts of the human brain that store memories by sound, pictures, or associations (relating one thing with another). In my new book, I call this collection of memory keepers--Sounds, Pictures, and Associations--the "SPA treatment." How good are you at spotting them?
Hint: If a quote isn't literally true, it's probably some sort of trope--words that associate someone or something with something else. For example, a metaphor is a trope; it makes one thing stand for something else. ("The moon is a balloon.")
Want to make your own lasting quotes? My book, Word Hero, shows 43 tools that make your words stick in people's heads.