Analysis of There was one I met upon the road

There was one I met upon the road
Who looked at me with kind eyes.
He said, "Show me of your wares."
And this I did,
Holding forth one.
He said, "It is a sin."
Then held I forth another;
He said, "It is a sin."
Then held I forth another;
He said, "It is a sin."
And so to the end;
Always he said, "It is a sin."
And, finally, I cried out,
"But I have none other."
Then did he look at me
With kinder eyes.
"Poor soul!" he said.