Split pea soup. How does Sps and clarity relate to poetry?

One of my favorite soups is an adage for clarity in a poem. The fog is thick as slit pea soup.

Poetry & cooking adhere to laws of physics. A body (whether it be carrot or word) moves towards or away from. In this conversation, "from" denotes clarity. Same can be said of a line.

Now, what we haven't discussed is whether clarity good or bad. Or for that matter, fog.