#4: Utile Dulci
What It Means:
"the useful with the agreeable"
Where It Comes From:
In Ars Poetica, Horace offered this advice:
"He who joins the useful with the agreeable, wins every vote, by delighting and at the same time instructing the reader."
In other words, the successful poet or more broadly, communicator combines the edifying with the enjoyable, turns business into pleasure.