Only one letter separates the two words, but "wishful" is having hope for something, and wistful is having sadness or melancholy about something. "Wist" isn't even a word that's used anymore, but you can still be wistful.
What did the poem "Wistful" (about the lonely hill) mean? Well, The poem shows the blacksmith as an honest, hard-working man who loved his family and God. The blacksmith sets an example of what the reader should be.
