Aphorisms are literature's hand luggage. Light and compact, they fit easily into the overhead compartment of your brain.
You only really discover the strength of your spine when your back is against the wall.
In the margin for error lies all our room for maneuver.
A simile is just a metaphor with the scaffolding still up.
Sometimes, you need a door slammed in your face before you can hear opportunity knock.
By bringing together what we know and what we don't know through analogy, metaphorical thinking strikes the spark that ignites discovery.