I and most people I know have read poetry that has either made no sense at all or could have been interpreted in many sorts of ways. Most poetry is subjective, I think. Love is probably the most misunderstood, misapplied, and misused word we have. Even the poets can't properly explain it. Proper expression and understanding of language is what allows us to convey our ideas.
Harmony exists due to many other factors.
I suppose language could be one of those factors, though.