I believe aphorisms are best when first read in the wild, free from the confines of any categories.
A simile is just a metaphor with the scaffolding still up.
In the margin for error lies all our room for maneuver.
Advice is given freely because so much of it is worthless.
Metaphor impinges on everything, allowing us - poets and non-poets alike - to experience and think about the world in fluid, unusual ways.
Aphorisms are literature's hand luggage. Light and compact, they fit easily into the overhead compartment of your brain.