A simile is just a metaphor with the scaffolding still up.
Advice is given freely because so much of it is worthless.
You only really discover the strength of your spine when your back is against the wall.
I believe aphorisms are best when first read in the wild, free from the confines of any categories.
Metaphor lives a secret life all around us. We utter about six metaphors a minute. Metaphorical thinking is essential to how we understand ourselves and others, how we communicate and learn, discover and invent.
Aphorisms are literature's hand luggage. Light and compact, they fit easily into the overhead compartment of your brain.