The phrase "a maxim about" is correct and usable in written English.
You can use it when referring to a general truth or principle that is expressed in a concise statement related to a specific topic.
Example: "There is a maxim about honesty that states, 'Honesty is the best policy.'"
Alternatives: "a principle regarding" or "a saying about".
The two Woonsocket legislators quickly decided to apply Rahm Emanuel's famous maxim about never letting a crisis go to waste.
"When the United States sneezes, the rest of the world catches a cold," is a longstanding maxim about the global economy that became only too true again in 2008.
For example, where there is a Cosmo, there should also be a Maxim – they're of about equal intelligence and relevance – and where there's an O Magazine, perhaps there's also a Men's Health.
In politics, there is a truism that you should be careful who and what you follow on stage, a maxim that is about to land on the Twin Cites with significant force in the wake of the much ballyhooed Democratic convention in Denver.
It's a maxim that came about with the best of intentions: "Don't bring me problems, bring me solutions". Generations of managers have doled out this one-liner, perhaps in the hopes of developing employees who are innovative problem-solvers.
The old Stalinist maxim about a million deaths being a statistic, a single death a tragedy, was demonstrated afresh.
If anything, her refusal to make the types of movies most associated with women suggests that in American movies, at least, genre is destiny, to repurpose a familiar Freud maxim about gender.
Christian Bale plays Irv Rosenfeld, a heavy-set, ugly, resentful and self-pitying grifter with a combover who appears to epitomise the Spinal Tap maxim about it being a fine line between stupid and clever.
It is, naturally, a quote from Steve Forbes Benjamin Franklinn's maxim about the inevitability of taxes is so familiar that it has the ring of a cliche.
Gaddafi is a sad example of the maxim about absolute power corrupting absolutely.
