What message is the speaker trying to convey in "On Wenlock Edge"?

What the speaker is talking about is the idea that all
people share the same troubles and that all people's troubles come to nothing in the
end.

The speaker is imagining the feelings of a Roman who
was, centuries ago, in the same place that he is now.  He imagines that the Roman had
the same kinds of concerns that he has and he says that the tree of human life is "never
quiet."  This shows us that people have always had
problems.

But then, at the end of the poem, he also says
that the Roman is dead and buried now.  This implies (whether for good or bad) that the
speaker, too, will one day die and will no longer have to think of his
problems.