The line
"The stout king stands in state
Till a wonder shall appear;"
in the excerpt from the poem Sir Gawain and the Green Knight shows that the knight king is awaiting something miraculous to happen at the Christmas celebration.
The North and Midwest drew many African Americans out of the South with promises of industrial jobs and a more racially tolerant environment. That is why hundreds of thousands of African Americans relocated to cities like Chicago, Los Angeles, Detroit, Philadelphia, and New York.
Hope this helps :)
So they believe what you say. It would be a waste of time to communicate with your audience if they dont even believe you.